Science - Revision Chapter 1- 4

Which of the following is a natural phenomenon?

• Dam construction

• Volcanic eruptions

• Use of mobile phones

• Discovery of new medicines

Tags

NGSS.MS-ESS3-2

Which of the following represents the prefix value of kilo?

• 10

• 100

• 1000

• 1000 000

diagram above shows a hazard symbol. what is the meaning of this symbol?

• flammable

• irritant

• explosive

• poisonous

Table above shows the volumes of a few marbles measured using the water displacement method. What is the volume of 5 marbles?

• 3 cm³

• 9 cm³

• 15cm³

• 21cm³

Tags

CCSS.3.MD.B.4

Diagram above shows three types of bottles with different labels. What are the chemicals that might contain inside bottle P, Q and R?

• P: chloroform, Q: ethanol, R: mercury

• P: Radium, Q: mercury, R: Pottasium

• P: Benzene, Q: potassium, R: radium

• P: lead, Q: petrol, R: chloroform

Tags

NGSS.MS-PS1-2

which of the following apparatus can be used to measure the volume of liquids?

• measuring cylinder , test tube

• beaker, stopwatch

• test tube, pipette

• measuring cylinder, beaker

Adam measures his pulse rate before running. What is the changes on his pulse rate after running ?

• Increases

• Decreases

• No changes

How do plants reduce water loss ?

• Bigger leaf surface

• The plant rolls up its leaves

• The larger number of stoma on the top of the leaf surface

Which of the following act is true for reptiles with the changes in hot weather ?

• Slow heartbeat

• Fast heartbeat

• Low rate of metabolism

• Slower movement

Transpiration cools a plant on a hot day.

• True

• False