24.25_E2_3C_Science_Revision

Label the features of a volcano.

a

b

c

d

e

f

crater

secondary cone

lava

crust

vent

magma

Match these words to their definitions:

• Focus

• A line that light travels in

• Asteroid

• A shaking of the Earth

• Earthquake

• The point in the crust where the earthquake starts

• Epicentre

• The point on the surface of the Earth above the focus

• Ray

• A rocky mass that orbits the sun

A mass of rocks and soil that slides down a slope is called (a)   .

Sort these surfaces into the correct columns.

Groups:

(a) Absorb light

,

(b) Reflect light

• brick wall

• paper

• eraser

• chopping board

• tinfoil

• rug

• metal spoon

• mirror

All ​ (a)   are made up of tiny particles that are constantly moving. In solids, the ​ (b)   are packed very tightly, so solids have a fixed shape and do not flow. In ​ (c)   , the particles are still close together, but they can ​ (d)   around each other. This is why liquids can flow and take the ​ (e)   of their container, but they still have the same amount of space inside.

• substances
• particles
• liquids
• move
• shape

The Earth is a planet. It is a ball of rock, metal and water, surrounded by a layer of gas called the ​ (a)   . The centre of the Earth is a ball of metal called the Earth’s core. It is divided into two parts: the ​ (b)   , which is a solid sphere made of iron and nickel, and ​ (c)   , which is a layer of molten metal that surrounds the inner core. This is surrounded by the ​ (d)   . The thin solid outer layer of the Earth is called the ​ (e)   . The Earth’s crust is thickest under the continents.

• atmosphere
• inner core
• outer core
• mantle
• crust

Light travels in straight lines.

• True

• False

The Earth spins all the time on its axis.

• True

• False

The reflection in the mirror is called image.

• True

• False

The Earth is at the centre of the solar system.

• True

• False