Pre assessment Science Club

Plants are essential to the ecosystem because they supply almost all energy or

food for other organisms. Through a process called photosynthesis, the light from the Sun is converted into energy. Besides photosynthesis, plants also do respiration. They breathe by using one of the gas and produce another gas.

What kind of gas that plants produce during day time and nighttime?

• Day time : Carbon dioxide

  Night time : Oxygen

• Day time : Oxygen

  Night time : Carbon dioxide

• Day time : Carbon dioxide

  Night time : Carbon dioxide

• Day time : Oxygen

  Night time : Oxygen

Because the temperature of the water is low, the air around the bottle gets ( ....... )

through a process of ( ....... ). As a result, the ( ....... ) in the air turns into liquid.

Therefore, the bottle becomes wet as the water drops get stuck to it.

• Cold – condensation – liquid

• Warm – sublimation – vapor

• Cold – evaporation – vapor

• Cold – condensation – vapor

There are some physical changes around us.

One of them is sublimation, the process when a material changes from a solid to a gas without passing through the intermediate liquid state.

Which of the following options is the correct example of sublimation in our daily life?

• 
• 
• 
• 

Oxygen is everywhere in the air. It is very important for our life as it is needed by human,

animal, and plant as the major component for respiration. Not only in the air, oxygen is also in the water.

Furthermore, the sand that you walk on also contains oxygen. From the following

options below, which one is not true about oxygen?

• Oxygen is needed to ignite the fire.

• The Earth is the only planet that has the most amount of oxygen.

• Oxygen is the major component of air in the earth

• Plants are the main producers of oxygen.

Some crabs can be found in the cold coastal waters.

Which of the following statements are true in helping the crab to adapt to its habitat?

i) The shell allows the crab to get oxygen to breathe.

ii) The shell protects the crab from its predators.

iii) The shell allows the crab to get food.

iv) The shell keeps the crab warm.

• Option (i) only

• Option (iv) only

• Options (i) and (ii)

• Options (ii) and (iv)

Mr. Ozawa and his son, Katsura, went for a hike in mount Kurama in Kyoto.

Unfortunately, they got lost at around 5 o’clock in the late afternoon.

They brought neither compass nor magnet to determine the direction to go back home.

Mr. Ozawa said that they would be able to find the direction by observing the Sun. He checked the location of the Sun and the direction to go home was on his back. Which direction was Mr. Ozawa facing to go home?

• South

• North

• West

• East