CE MC 02

A glowing splint relights when it is put in

• carbon dioxide

• hydrogen

• nitrogen

• oxygen

If a football is held between a small bright light source and a screen, the shadow cast will be sharp at the edge; this shows that

• light disperses to give a spectrum

• light is reflected from shiny surfaces

• light travels at about 300 000 000 metres per second

• light travels in straight lines

The nucleus

• controls the cell

• photosynthesises

• respires

• stores energy

An element which forms an acidic oxide is

• carbon

• copper

• iron

• silver

On the Moon, a gravitational force of 1.6 newtons acts on every kilogram. The mass of an astronaut is 70 kilograms. On the Moon, his weight would be about

• 0 N

• 7 N

• 112 N

• 700 N

The place where an organism lives is

• a community

• a country

• an ecosystem

• a habitat

The most common gas in the atmosphere is

• carbon dioxide

• hydrogen

• nitrogen

• oxygen

A non-renewable energy resource is

• biomass

• coal

• solar

• tidal

An omnivore eats

• both animals and plants

• neither animals nnor plants

• only animals

• only plants

A substance which forms a solution in water with a pH of 7 is

• carbon dioxide

• salt

• sodium oxide

• sulfur dioxide