Download STC HS Admission Test Reviewer # 2

REVIEWER # 2 IN SCIENCE
HS ADMISSION
Directions: Read each question carefully. Select the best answer from the four choices. Encircle your
answer.
1.
Your mother brought ½ kilo raw mangoes from the market. She placed them in a basket. After 3
days, the green mangoes turned yellowish in color. What change took place?
A. physical change
C. energy change
B. chemical change
D. electrical change
2.
A child pours water into a plastic container in the freezer. After an hour it turned into ice. What
change took place?
A. physical change
C. energy change
B. chemical change
D. electrical change
3.
How can you produce a chemical change in wood?
A. chop it
C. burn it
B. cut it into many tiny pieces
D. put it in water
4.
What form of energy do muscles, wind and running water show when they do work?
A. mechanical work
C. nuclear energy
B. sound energy
D. potential energy
5.
A big mango fruit is on the edge of table. What kind of energy does it have?
A. mechanical energy
C. potential energy
B. heat energy
D. kinetic energy
6.
A boy threw a ball over the fence. What energy did the moving ball have?
A. Potential energy
C. mechanical energy
B. Heat energy
D. light energy
7.
Which sequence of energy transformation takes place when you switch on an electric bulb?
A. light  heat  electrical C. electrical  light  heat
B. electrical  heat  light D. heat  electrical  light
8.
When gasoline is burned in a car engine and the car moves, what energy is generated?
A. chemical energy C. nuclear energy
B. mechanical energy
D. light energy
9.
What form of energy is released when a uranium atom is split?
A. Potential energy
C. mechanical energy
B. Nuclear energy
D. chemical energy
10. What is the process of changing one form of energy to another to make it useful?
A. nuclear energy
C. potential energy
B. energy transformation
D. kinetic energy
11. Which is an example of heat transfer by conduction
A. boiling water
C. a spoon in a very hot water
B. a very warm room
D. you feel warm as you stay near the stove
12. What kind of energy is involved when ice melts?
A. Light energy
C. heat energy
B. Chemical energy
D. nuclear energy
13. How can you conserve electricity at home?
A. Switch off light when not in use.
B. Turn on the air conditioner when the weather is cool.
C. Iron one piece of clothing every time you need to wear one.
D. Leave the refrigerator open for a long time.
14. Which of the following shows that electrical energy is transformed into sound energy?
A. when the passengers in the car talk
B. when the policeman blows his whistle
C. when the passenger gets off his car
D. when the driver blows the horn of the car
15. How is the sun’s heat transferred to the objects on earth?
A. by conduction
C. by radiation
B. by convection
D. by transformation
16. Green plants transform the sun’s energy into chemical energy. Food inside the body combines
with oxygen and produces heat in your body. Where does the heat of your body go?
A. to the clothes you wear
C. to the environment
B. to the stomach
D. to the face
17. When the nuclei of certain hydrogen atoms are forced to combine, tremendous energy is produced.
What is the process called?
A. nuclear change
C. nuclear fusion
B. nuclear fission
D. nuclear transformation
18. You see a flag waving on a pole. A force is acting on the flag. What is exerting that force?
A. Wind
C. gravity
B. Water
D. magnet
19. When you throw a ball, it goes up; then it goes down. Why?
A. The force moving it is not strong.
B. Gravity does not act on the ball upon release.
C. Gravity pulls the ball down.
D. The speed of the ball is affected by air friction.
20. What is always produced when there is energy transformation?
A. Heat
C. Electrical
B. Chemical
D. Radiant