Read and answer each question carefully. Tick the letter of the best answer.
1. When does iron most likely to develop rust on it? *
A. when it is wet
B. when it is dry
C. when it is painted
D. when it is covered with grease.
2. When do we say that a substance undergoes chemical change? *
A. When the taste of the substance is changed.
B. When the appearance of the substance is changed.
C. When a new substance is formed as a result of the change.
D. When the form, size and shape of a substance are changed.
3. Rice when cooked undergo a chemical change. What causes this change? *
A. cooling
B. freezing
C. heating
D. melting
4. Which of the following is NOT an example of physical change? *
A. burned leaves
B. cracked grounds
C. cut down trees
D. pounded rocks
5. What are needed for combustion to happen? I. fuel II. oxygen III. heat IV. water *
A. I and II
B. II and III
C. I, II, and III
6. Which is NOT an evidence of chemical change? *
A. presence of precipitation
B. release of gas and smoke
C. production of new substance
D. change in size and shape.
7. How can rusting of iron materials like kitchen utensils, tools, and window frame be avoided? I. by applying paints to the window frames II. by applying some grease on the iron materials like tools III. by keeping your kitchen utensils in a closed container IV. by keeping the iron materials in a damp place *
A. I only
B. I, II and III
C. II and III
D. I, II, III and IV
8. Mary had a birthday party in their house. Her mother prepared some foods to eat, the next morning, she noticed some bubbles appeared on the food. What happened to the food?
A. there was spoilage in the food
B. there was an increase in the volume of the food
C. there was microorganism observed on the food
D. there were no changes in the odor and taste of the food
9. Which of the following shows chemical change? *
A. ground pepper
B. cut paper
C. chopped wood/log
D. rusted roof
10. Which is an example of a physical change? *
A. baking a cake
B. chopping wood/log
C. burning rubber
D. decomposing garbage
1. When does iron most likely to develop rust on it? *
A. when it is wet
B. when it is dry
C. when it is painted
D. when it is covered with grease.
2. When do we say that a substance undergoes chemical change? *
A. When the taste of the substance is changed.
B. When the appearance of the substance is changed.
C. When a new substance is formed as a result of the change.
D. When the form, size and shape of a substance are changed.
3. Rice when cooked undergo a chemical change. What causes this change? *
A. cooling
B. freezing
C. heating
D. melting
4. Which of the following is NOT an example of physical change? *
A. burned leaves
B. cracked grounds
C. cut down trees
D. pounded rocks
5. What are needed for combustion to happen? I. fuel II. oxygen III. heat IV. water *
A. I and II
B. II and III
C. I, II, and III
6. Which is NOT an evidence of chemical change? *
A. presence of precipitation
B. release of gas and smoke
C. production of new substance
D. change in size and shape.
7. How can rusting of iron materials like kitchen utensils, tools, and window frame be avoided? I. by applying paints to the window frames II. by applying some grease on the iron materials like tools III. by keeping your kitchen utensils in a closed container IV. by keeping the iron materials in a damp place *
A. I only
B. I, II and III
C. II and III
D. I, II, III and IV
8. Mary had a birthday party in their house. Her mother prepared some foods to eat, the next morning, she noticed some bubbles appeared on the food. What happened to the food?
A. there was spoilage in the food
B. there was an increase in the volume of the food
C. there was microorganism observed on the food
D. there were no changes in the odor and taste of the food
9. Which of the following shows chemical change? *
A. ground pepper
B. cut paper
C. chopped wood/log
D. rusted roof
10. Which is an example of a physical change? *
A. baking a cake
B. chopping wood/log
C. burning rubber
D. decomposing garbage
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d
Explanation:
when in its covered that grease
Answer:
A.yan Ang answer Makita ko SA likod Ng modyul ko