Activity 1 BENDING COIN EXPERIMENT Place the pencil in the cup without water. Look at the cup at eye level. Draw what you see Place the pencil in the cup with water. Look at the cup at eye level. Draw what you see. 2. Why did this happen? Key questions: 1. What is the difference between the two drawings?
1. Activity 1 BENDING COIN EXPERIMENT Place the pencil in the cup without water. Look at the cup at eye level. Draw what you see Place the pencil in the cup with water. Look at the cup at eye level. Draw what you see. 2. Why did this happen? Key questions: 1. What is the difference between the two drawings?
Answer:
1. What's the difference between the two drawings?
- The first drawing of the pencil in the cup with no water is the pencil is not bent. But, on the other drawing the pencil looks bent...
2. Why did this happen?
-In this experiment, light first travels through the air – which is easy to move through – and then through the water, where it slows down. This change in speed causes the light to bend, or refract, meaning that the part of the pencil that is in the water will appear to be bent.
2. Pre-Assessment Directions: Write the letter of the correct answer on a separate sheet of paper 1. What is the first step in the scientific method? A asking a question C. gathering information B. forming a hypothesis D. organizing data 2. Which of the following statements would be TRUE of the scientific method? A People structure their lives on the principle of scientific method. B. Scientists report the experimental results, but not the experimental design. C. The scientific method is a continuous process by which people leam about his world. When the results of the experiment do not fit the hypothesis, a scientist may discard the results and stop the experiment. 3. When scientists wish to communicate the results of their research, they are most likely to do which of the following? A Call a press conference, B. Immediately repeat the research C. Sell their findings to other researchers D. Write a concise report with complete results and proofs to the experiments performed and formulate conclusions. 4. Suppose your mother sent you to the market to buy fruits and vegetables. How would you choose good quality fruits and vegetables? A. Ask the vendor to choose it for you. B. Just get any kind and pay right away. C. Examine the fruit if it is free from insect bites and the smell of insecticide. D. Tell your mother that you do not know how to buy good quality fruits and vegetables 5. How is a hypothesis tested ? A. by conducting an experiment and looking for results B. by comparing observations in nature with predictions C. by using the hypothesis to make predictions about a system D. all of the above 6. During an experiment about a coin and feather that were dropped at the same time, it was found that coin reached the ground first. One student said: "Maybe, the coin is heavier than the feather." What do you call this kind of statement? A. a problem B. a conclusion C. a hypothesis D. an interpretation For items 7-9: A group of students was asked to investigate how fast sugar dissolves in cold and in hot water? 7. If this is going to be a fair test, what variables should they control? A Amount of water and sugar in each cup, method of stirring, time when the solid is added to water, how long each solution is stirred. B. Amount of water and sugar in each cup, method of stirring, how long each solution stirred. C. Amount of sugar in each cup: method of stirring, time when the solid is added to water, how long each solution stirred. D. Amount of water in each cup, method of stirring, time when the solid is added to water, how long each solution is stirred. 8. What is the dependent variable (what is being measured)? L. The temperature of water. It The amount of sugar. HE The length of time that sugar completely dissolves in hot water. IV. The length of time that sugar completely dissolves in cold water. C. II and III D. III and IV A. I only B. Il only
Answer:
1.b 2.c 3.b 4.a 5. c 6.b 7. a 8.d 9.c
3. EVALUATION Directions: Solve the following problems. Make predictions based on the results of each experiment through experiment and theoretical probabilities. Write your answer on a separate sheet of paper. 1. How many numbers can be made from the digits 3,5,9, and 6 if each digit is used once? 2. Kate has 6 blouses and 7 skirts. How many different outfits can she make? 3. Jimmy is going to buy a new bike. He can choose from a speed bike, a motor bike, or a tandem bike. His color black, purple, blue and silver. How many different combinations does Jimmy have to choose from? 4. The Grade 6 class sells cold drinks. Customers can avail small, medium, or large cup. There are four drinks to from: soft drinks, juice drink, milk, and water. Customers may opt to have ice or with no ice. a. Find the total number of possible choices. b.What is the probability that a costumer will order a medium juice drink with no ice?5.If you flip two coins 24 times, what is the best prediction possible for the number of times both coins wil land on tails?
Answer:
1. 24
2. 42
3. 12
4. a. 24
b.
[tex] \frac{1}{24} [/tex]
5. 6 times
Step-by-step explanation:
hope it helps! <3
4. I had just reached the railway station and was waiting for my train to arrive as I had to travel to Jaipur for a family function of my friend. When I asked the Train Enquiry Department, they told me that the train will arrive at 9.00 pm, which meant I had to wait for an extra hour. So I tried to pass my time by having a look at the station and the things happening there. Since it was a small station, there were very few passengers. I saw a group of boys playing with the pebbles. The boys were all dressed up quite pathetically as their clothes were very dirty and torn. But still they were quite happy with the pebbles and were enjoying to the fullest. Suddenly I developed an urge to drink tea as it was a cold evening, but to my misfortune, I couldn’t find any tea vendors at the station. The only tea vendor was sitting outside the station and I couldn’t take the risk of leaving all my luggage at the station just to drink the tea. I called one of the boys from the guys and asked him to bring me a cup of tea by handing him a coin of 5 rupees. He agreed and went to bring me the tea. Time passed and after half an hour, I heard the announcement which said that my train would be arriving in a couple of minutes. Now I was sure that the child ran away with the money and cursed myself for trusting a road side boy. I stood up to pick my luggage as the train arrived. I was just about to enter the coach when I heard a voice which said, “Babuji, Apki chai” (translates to ‘Sir, your tea’). Surprised with the voice, I looked back and asked him, “Why did he bring the tea so late?” He told me, he lost the 5 rupees coin and so he had to clean the utensils of the tea vendor, to bring me a cup of tea. 1. What did the man think when the boy did not return at once? 2. What took the boy too long to return? 3. What do you think the man felt after knowing it? Why? 4. Does his experience reflect bias or prejudice? Why? 5. How can we avoid this kind of situation?
Answer:
1. He thought that the boy ran away with his money.
2. He loest 5 rupees that's why it took too long for him to return
3. I think he felt happy because the boy really came back with the tea he wanted and the boys also clean utensils just to pay the tea.
4. Prejudice, because he already think that the boy ran away because he's just some kind of a road side boy.
5. Maybe we can avoid this kind of situation if we don't judge each other.
hope it helps not sure if tama mga sagot or grammar
5. ____1. If two coins are tossed once, which is NOT a possible value of the random variable for the number of heads?a. 0 b. 1 c. 2 d. 3____2. It is a numerical quantity that is assigned to the outcome of an experiment.a. probability b.probability distribution c. random variabled. variable____3. Which of the following is a variable whose value is obtained by measuring?a. Continuous b. Discrete c. Interval d. Nominal____4. Which term can best describe a variable that can be counted?a. Continuous b. Discrete c. Interval d. Ratio____5. Which of the following statement describe a continuous random variable?a. The average distance traveled by a jeep in a weekb. The number of students present in a Class Anthuriumc. The number of motorcycles owned by a randomly selected householdd. The number of girls taller than 5 feet in a random sample of 10 girls.____6. Which of the following statement DOES NOT describe a continuous random variable?a. Height of students in a certain classb. The average weight of chicken each dayc. The number of towns belong to Quezon Provinced. The distance travelled by a delivery van in an hour____7. Which of the following is a discrete random variable?a. The amount of sugar in an orange juiceb. Number of pencils in a boxc. Amount of sugar used in a cup of coffeed. Voltage of car batteries
Answer:
1. D
2. B
3. B
4. B
5. A
6. C
7. B
6. 25. The weights of the eggs produced by a certain breed of hen are normally distributed with mean 65 gramsand standard deviation of 5 grams. Which of the following will you use?A. Normal DistributionC. Central Limit TheoremB. Discrete Probability DistributionD. Binomial Distribution26. In a study done on the life expectancy of 500 people in a certain geographic region, the mean age at deathwas 72 years and the standard deviation was 5.3 years. If a sample of 50 people from this region isselected, and the probability that the mean life expectancy will be less than 70 years, which of thefollowing will you use?A. Normal DistributionC. Central Limit TheoremB. Discrete Probability DistributionD. Binomial Distribution27. Suppose the teenagers that attend public high schools get an average of 5.7 hours of sleep each night witha standard deviation of 17 hours. Assume that the average sleep hour is normally distributed, and 35 highschool students are randomly selected. Compute the 2-score for 6 hours of sleep.A. 1.04B. 0.18C. 0.52D. 0.8228. Suppose the teenagers that attend public high schools get an average of 5.7 hours of sleep each night witha standard deviation of 1.7 hours. Assume that the average sleep hour is normally distributed, and 35 highschool students are randomly selected. What is the probability that a randomly selected group of 35 highschool students gets more than 6 hours of sleep each night?A. 0.3508B. 0.1492C. 0.0714D. 0.428629. What will be the degree of freedom of the data whose sample size is 187A. 17B. 18C. 19D. 2030. Researchers found that boys playing high school football recorded an average of 355 hits to the head witha standard deviation of 80 hits during a season. What is the probability on a randomly selected team of 48players that the average number of head hits per player is between 340 and 360?A. 56.96%B. 43.04%C. 40.32%D. 16.64%31. Which of the following is NOT a characteristics of t-distribution?A. Like the normal distribution, the t-distribution has a smooth shape.B. Like the normal distribution, the t-distribution is symmetric. If you think about folding it in half at themean, each side will be the same.C. Like a standard normal distribution (or z-distribution), the tdistribution has a mean of one.D. The normal distribution assumes that the population standard deviation is known. The t-distributiondoes not make this assumption,32. If three coins are tossed, which is NOT a possible value of the random variable for the number of tails?A.1В. 2C.3D. 433. Which of the following is a discrete random variable?A. Length of electrical wiresC. Number of pencils in a boxB. Amount of sugar used in a cup of coffeeD. Voltage of car batteries34. It is a numerical quantity that is assigned to the outcome of an experiment.A. random variable B. variableC. probability D. probability distribution35. What will be the degree of freedom whose t-value is 0.68978. 2CH3
Answer:
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7. B. metal spoon ___2. Peter accidentally spilled his water on the floor. Which of the following materials should he use to dry the water easily? A. dustpan C. walis tambo B. rug D. walis tingling 3. The Grade 4-Matikas conducted an experiment if what are the materials that float and sink. Which of the following materials float in water A. large stones C. pencil's eraser B. metal spoon D. Styrofoam cups -4. Juan Miguel threw some materials in a pail of water. He noticed that all of them float in water EXCEPT one. Which of the following materials will sink A. 1-peso coin C. cork B. a piece of Styrofoam D. plastic bottle with cup __5. Which of the following materials will undergo decay? A. camote leaves C. plastic cover B. bottle of Mang Tomas D. plastic spoon 6. Which of the following pictures will NOT undergo decay? A. B. C. D. __7. Which group of materials will undergo decay? A. banana peel, chicken skin and leftover meat B. empty can of sardines, bottles of soft drinks and broken pieces of glass C. laptop. Television and radio D. plastic chair, metal spoon and rubber slipper _8. The materials below undergo decay EXCEPT from one. Which does not belong to the group? A. ballpen C. paper B. mango D. Sinigang na Baboy _9. Complete the list of decaying materials: kangkong leaves, leftover food and A. lunchbox C. rubber ball B. dead rat D. scissors 10. Which of the following is not helpful to our environment? A. Plant trees B. Clean the surroundings C. Land and water pollution D. Do not throw garbage in river 11. There are a lot of sickness that we can get in decaying materials. Which of the following diseases is spread by mosquito? A. Asthma C. Dysentery B. Dengue D. Typhoid
Answer:
Which sentence describes an example of a positive feedback loop? a. warm-blooded animals sweat when they get too hot. sweating is a method by which the body cools itself. b. a thermostat regulates temperature by turning a furnace or air conditioner on and off. c. when blood flows from a mild cut, blood clots form to prevent excessive bleeding. d. as oceans get hotter, they release more co2, which then increases atmospheric and ocean temperatures.
Explanation:
2. Peter accidentally spilled his water on the floor. Which of the following materials should he use to dry the water easily?Answer:
B. RugExplanation: Because Rug can absorb the water on the floor.
3. The grade 4-Matikas conducted an experiment if what are the materials that float and sink. Which of the following materials float in water?Answer:
D. Styrofoam CupsExplanation: Styrofoam cups has less density than water.
4. Juan Miguel threw some materials in a pail of water. He noticed that all of them float in water EXCEPT one. Which of the materials will sink?Answer:
A. 1-Peso coinExplanation: Materials that has more density than water will sink.
5. Which of the following materials will undergo decay?Answer:
A. Camote leavesExplanation: Because leaves releases carbon back to atmosphere.
6. Which of the following pictures will NOT undergo decay?(There's no picture attached)
7. Which group of materials will undergo decay?Answer:
A. Banana peel, chicken skin, and leftover meatExplanation: Foods can go decay because of the oxygen.
8. The materials below undergo decay EXCEPT from one. Which does not belong to the group?Answer:
B. MangoExplanation: Mango decays because it's a part of its aging.
9. Complete the list of decaying materials: Kangkong leaves, leftover food andAnswer:
B. Dead ratExplanation: Not only foods or leaves can go decay, dead animals go decay too.
10. Which of the following is not helpful to our environment?Answer:
C. Land and Water pollutionExplanation: Some things are dangerous to the environment especially POLLUTION because it can damage trees, animals, and even us.
11. There are lot of sickness that we can get in decaying materials. Which of the following diseases is spread by mosquito?Answer:
B. DengueExplanation: Mosquito causes dengue virus because when it bites a person who has dengue, mosuito can transmit the virus to another person.
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Hope it helps.#CarryOnLearning8. D. Read the text below and answer the questions that follow.I had just reached the railway station and was waiting for my train to arrive as I had to travel to Jaipur for a family function of my friend. When I asked the Train Enquiry Department, they told me that the train will arrive at 9.00 pm, which meant I had to wait for an extra hour. So I tried to pass my time by having a look at the station and the things happening there. Since it was a small station, there were very few passengers.I saw a group of boys playing with the pebbles. The boys were all dressed up quite pathetically as their clothes were very dirty and torn. But still they were quite happy with the pebbles and were enjoying to the fullest. Suddenly I developed an urge to drink tea as it was a cold evening, but to my misfortune, I couldn’t find any tea vendors at the station. The only tea vendor was sitting outside the station and I couldn’t take the risk of leaving all my luggage at the station just to drink the tea.I called one of the boys from the guys and asked him to bring me a cup of tea by handing him a coin of 5 rupees. He agreed and went to bring me the tea. Time passed and after half an hour, I heard the announcement which said that my train would be arriving in a couple of minutes. Now I was sure that the child ran away with the money and cursed myself for trusting a road side boy. I stood up to pick my luggage as the train arrived. I was just about to enter the coach when I heard a voice which said, “Babuji, Apki chai” (translates to ‘Sir, your tea’).Surprised with the voice, I looked back and asked him, “Why did he bring the tea so late?”He told me, he lost the 5 rupees coin and so he had to clean the utensils of the tea vendor, to bring me a cup of tea. 1. What did the man think when the boy did not return at once?___________________________________________________________2. What took the boy too long to return?___________________________________________________________3. What do you think the man felt after knowing it? Why?___________________________________________________________4. Does his experience reflect bias or prejudice? Why?___________________________________________________________5. How can we avoid this kind of situation?__________________________________
Answer:
1. He take away the money.
2. He lost the 5 rupees coin so he had to clean the utensils of the tea vendor.
3. Surprised, sad and touched, because he didn't expect that that would be the reason why the boy take time to comeback, he judged him without knowing the reason of it, and he is touched 'cause the boy really make an effort just to buy the tea.
4. Prejudice, he JUDGED him, and judgement is prejudice.
5. Always look on the other side of the story.
Explanation:
#LetTheEarthBreath
#PlantMoreTreesAndPlant
#SaveTheEarth
9. ____1. If two coins are tossed once, which is NOT a possible value of the random variable for the number of heads?a. 0 b. 1 c. 2 d. 3____2. It is a numerical quantity that is assigned to the outcome of an experiment.a. probability b.probability distribution c. random variabled. variable____3. Which of the following is a variable whose value is obtained by measuring?a. Continuous b. Discrete c. Interval d. Nominal____4. Which term can best describe a variable that can be counted?a. Continuous b. Discrete c. Interval d. Ratio____5. Which of the following statement describe a continuous random variable?a. The average distance traveled by a jeep in a weekb. The number of students present in a Class Anthuriumc. The number of motorcycles owned by a randomly selected householdd. The number of girls taller than 5 feet in a random sample of 10 girls.____6. Which of the following statement DOES NOT describe a continuous random variable?a. Height of students in a certain classb. The average weight of chicken each dayc. The number of towns belong to Quezon Provinced. The distance travelled by a delivery van in an hour____7. Which of the following is a discrete random variable?a. The amount of sugar in an orange juiceb. Number of pencils in a boxc. Amount of sugar used in a cup of coffeed. Voltage of car batteries
Answer:
1.a
2.d
3.b
4.c
5.d
6.c
7.a
Answer:
1. D
2. C
3. A
4. B
5. A
6. B
7. B
10. Pre-Assessment A. Directions: Write the letter of the correct answer on a separate sheet of paper. 1. What is the first step in the scientific method? a. asking a question b. forming a hypothesis c. gathering information d. organizing data 2. Which of the following statements would be true of the scientific method? a. People structure their lives on the principle of scientific method. b. Scientists report the experimental results, but not the experimental design. c. The scientific method is a continuous process by which people learn about his world. d. When the results of the experiment do not fit the hypothesis, a scientist may discard the results and stop the experiment. 3. When scientists wish to communicate the results of their research, they are most likely to do which of the following? a. call a press conference b. immediately repeat the research c. sell their findings to other researchers d. write a concise report with complete results and proofs to the experiments performed and formulate conclusions 4. Suppose your mother sent you to the market to buy fruits and vegetables. How would you choose good quality fruits and vegetables? a. Ask the vendor to choose it for you. b. Just get any kind and pay right away. c. Examine the fruit if it is free from insect bites and the smell of insecticide. d. Tell your mother that you do not know how to buy good quality fruits and vegetables. 5. How is a hypothesis tested ? a. by conducting an experiment and looking for results b. by comparing observations in nature with predictions c. by using the hypothesis to make predictions about a system. d. all of the above 26. During an experiment about a coin and feather that were dropped at the same time, it was found that coin reached the ground first. One student said: “Maybe, the coin is heavier than the feather.” What do you call this kind of statement? a. a problem b. a conclusion c. a hypothesis d. an interpretation For items 7-9: A group of students was asked to investigate how fast sugar dissolves in cold and in hot water? 7. If this is going to be a fair test, what variables should they control? a. Amount of water and sugar in each cup, method of stirring, time when the solid is added to water, how long each solution is stirred. b. Amount of water and sugar in each cup, method of stirring, how long each solution stirred. c. Amount of sugar in each cup; method of stirring, time when the solid is added to water, how long each solution stirred. d. Amount of water in each cup, method of stirring, time when the solid is added to water, how long each solution is stirred. 8. What is the dependent variable (what is being measured)? The temperature of water. The amount of sugar. The length of time that sugar completely dissolves in hot water. The length of time that sugar completely dissolves in cold water. a. I only b. II only c. II and III d. III and IV 9. What is the independent variable in the investigation? a. I only c. I, II and III b. II and III d. II, III and IV 10. Why is the Scientific Method an important process in doing experiments? a. It takes more work but it’s worth it. b. It helps the experiment to take longer and be better. c. It ensures that the results can be trusted and repeated. d. It ensures that the people doing the experiments are scientific. For items 11-15: You want to prove that trees lower the air temperature under the leaves because of the shade. You stand under the tree, hold out an air thermometer under the shade for a few minutes, and record the air temperature. You then move to an area where there are no trees and record the air temperature. 11. What is the experimental setup? 12. What is the control setup? 13. What is the idependent variable? 14. What is the dependent variable? 15. What factors will you keep constant? plspls ngayon na yung deadline po plsplsplspslpslsp
Answer:
10 The scientific method attempts to minimize the influence of bias or prejudice in the experimenter. Even the best-intentioned scientists can't escape bias. That's the job of the scientific method. It provides an objective, standardized approach to conducting experiments and, in doing so, improves their results.
11 Experimental Setup In this section you describe how the experiment was done and summarize the data taken. One typically describes the instruments and detectors used in this section. Describe the procedure followed to collect the data. If the experiment is complex, the procedure might be described in a separate section.
12 A control setup in a scientific experiment is separate from the main experiment and is a setup in which the independent variable under investigation cannot affect the results. This isolates the effect of the independent variable and helps eliminate alternative explanations of the investigation results.
13 An independent variable is exactly what it sounds like. It is a variable that stands alone and isn't changed by the other variables you are trying to measure. For example, someone's age might be an independent variable.
14 Just like an independent variable, a dependent variable is exactly what it sounds like. It is something that depends on other factors. Usually when you are looking for a relationship between two things you are trying to find out what makes the dependent variable change the way it does.
15 The factors that can change value during an experiment or between experiments, such as water temperature, are called variables, while those that stay the same, such as acceleration due to gravity at a certain location, are called constants
