grade 4 science revision

Hamza builds a simple electrical circuit. He closes the switch. What happens to the lamp when he opens the switch?

• It lights up.

• It becomes dim.

• It turns off.

• It becomes hot.

Which of the following is a non-flowering plant?

• Buttercup

• Cherry tree

• Wheat

• Bracken

Alia and Maryam measure their heart rates and body temperatures while at rest. They exercise for a few minutes. Then they measure their heart rates and body temperatures again. What conclusion do the results support?

• When people exercise their temperature decrease.

  
  

• When people exercise their muscles get longer.

• When people exercise their heart rate increase.

• When people exercise their bodies get stronger.

A graph shows the total amount of rainfall during four months. The x axis has the names of months. What would be the best label for y axis?

• Town

• Month

• Temperature (℃)

• Rainfall (cm)

Zayed feeds some fish in a fish tank at 8am, 1pm and 8pm every day for two weeks. He observes that the fish eat more in the morning than at other times of the day. Ali wants to check Zayed’s results. Ali should do this by …

• Repeating the experiment exactly as Zayed did.

• Only feeding the fish at 1pm and 8pm.

• Changing the type of food given to the fish.

• Giving the fish more food later in the day.

Which substance will a wooden box move over more easily?

• Carpet

• Sand

• Hay

• oil

Aisha is investigating air resistance. She drops a pen, a ball, a glove and a flat sheet of paper from the same height. Which object will take the longest time to reach the ground?

• The pen

• The ball

• The glove

• The paper

Lamar plants tomato plants in different types of soil. After one month the plant in soil 1 has grown taller than the plant in soil 2. Lamar would know that the type of soil had caused the difference in plant growth if she had

• Kept one plant in a warmer place than the other plant.

• Given the plants the same volume of water.

• Checked both plants every day.

• Put one plant in a cupboard and the other in the windowsill.

Which type of teeth is coloured green in the picture?

• Incisors

• canine

• molar

• wisdom

Which action is an observation?

• Gathering equipment for a plant investigation.

• Measuring how much a plant grows each day for a week.

• Predicting how much a plant will grow in one week.

• Explaining why a plant grew differently under certain conditions.