Science revision Class IV

which is an example of man- made things?

• bridge

• Tree

• Air

• Mountain

2. Organisms that make their own food by using sunlight are known as

• heterotrophs

• autotrophs

• carnivores

• omnivores

the male parts of flower is called

• Ovary

• Stamen

• Style

• Stigma

Female parts of flower is called

• Anther

• petal

• Carpel

• pedicel

Greenhouse is useful to grow crops in places where there is

• lot of water

• no water at all

• low temperature

• high temperature

In the absence of light, green leaves of plant

• turn yellow

• remain green

• grow in number

• grow in size

An instrument to measure temperature is called

• kilogram

• centimetre

• Thermometer

• mass

plants use carbon dioxide for

• making food

• to grow

• to make bigger size

• to make leaves green

plants need oxygen for

• become strong plants

• break down the food for energy

• to make the leaves yellow

• make food

Animals which kill and eat other animals are called

• Prey

• Predators

• tiger

• food