Activity 1. Read each sentence carefully. Write the letter of your answer on the
blank provided before the number.

1. Heat and light comes from different sources Which of these gives us enough heat and light in order to live?
A. sun
B. hydro power plant
C. electricity
D. generator
D. All of the above
2. Why do opaque objects for shadow?
A. Because they absorb the light and hit them.
B. Because they reflect the light.
C. Because they bend the light that hit them.
D. Because they cover the light that hits them.
3. When does the object cast a longer shadow?
A. When light rays are slanted
B. When light rays are on top
C. When light rays are sideways
D. When light rays are trapped
4 When are shadow formed?
A. When light ray hit an opaque objects
B. When light rays hit transparent objects
C. When light rays hit translucent objects
D. When light rays hit hard objects
5. Why do we need to drink more water on very hot days?
A. To make our skin healthier.
B. To increase our body temperature.
C. To replace the water loss from our body.
D. To make our digestive system healthy.​