Science and Mathematics Quiz

A car accelerates from 0 to 20 m/s in 5 seconds. What is its acceleration?

• 1 m/s²

• 4 m/s²

• 5 m/s²

• 10 m/s²

Which energy transformation occurs in a battery-powered flashlight?

• Chemical → Light

• Kinetic → Electrical

• Thermal → Light

• Light → Chemical

A seesaw is an example of:

• Lever

• Pulley

• Inclined plane

• Wheel and axle

When light passes from air into water, it:

• Speeds up

• Stops

• Slows down

• Changes color

Conduction involves heat transfer through:

• Empty space

• Direct contact

• Fluid currents

• Electromagnetic waves

How many oxygen atoms are in H₂SO₄?

• 1

• 2

• 3

• 4

Rusting of iron is a:

• Physical change

• Chemical change

• Reversible change

• Nuclear change

A substance with pH 12 is:

• Strong acid

• Weak acid

• Strong base

• Weak base

Dry ice (solid CO₂) sublimates directly to gas. This is a:

• Physical change

• Chemical change

• Combustion

• Decomposition

The atomic number of Carbon is 6. How many protons does it have?

• 6

• 12

• 18

• 24