Science Chapter 3 Form 1

What is meant by the mass of an object?

• Quantity of substance in an object.

• Pull of gravity on an object.

• Pressure exerted by an object

• Total force exerted by an object.

Which is the best definition for matter?

• Anything which has shape.

• Anything which has volume

• Anything which has volume and mass

• Anything which has mass and occupies space

A ballon expands and its weight increases as it is filled with water. This shows that...

• water has mass

• water takes up spaces

• water is matter

Which of the following statements is the best to explain the need for homeostasis to the organism ?

• Avoid sudden death

• Maintain constant body temperature

• Ensure that all enzymes involved in chemical reactions work well

• Provides optimum internal environment for efficient metabolic activity

Tags

NGSS.HS-LS1-3

Shivering in the cold produces heat in the body.

• True

• False

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

All chemical reactions in living cells are controlled by _________________ that are sensitive to surrounding changes.

• brain

• nerve

• fluids

• enzymes

Tags

NGSS.MS-LS1-7

Solids possess fixed shapes and volumes because their particles...

• do not have energy

• attract one another

• keep the same positions

• are of the same size

The perfumes used by a girl can be detected when she passes by. How can this be explained?

• Particles of perfume diffuse quickly through the air

• Particles of perfume combine with air particles

• Particles of perfume float in the air

• Perfume sets free smell into the air

Which statement below is incorrect?

• Particles of solids vibrate in their own positions.

• Particles in liquids can move about freely

• Particles in gases diffuse in all directions

• The movement of particles in matter decreases with rise in temperature

When your mother is cooking curry in the kitchen, people in the sitting room can smell the curry. This is an application of...

• diffusion of gases

• density of air

• convection currents

• the principle of flotation