The model shows the different layers of the Earth.

Match the letter to the correct layer.

• Mantle

• C

• Crust

• A

• Core

• B

Tags

NGSS.MS-ESS2-1

The model shows the different layers of the Earth.

Select the core

Tags

NGSS.MS-ESS2-1

The model shows the different layers of the Earth.

Select the crust

Tags

NGSS.MS-ESS2-1

This is ​ (a)   a good model of Earth, because Earth has ​​ (b)   layers, whereas the model only shows ​ (c)   layers.

• not

• four

• three

• five

• two

• six

• seven

• eight

Answer explanation

The correct choices are 'not' because the model is not a good representation of Earth, 'four' because Earth has four layers, and 'three' because the model only shows three layers.

The star found at the center of our solar system is called the

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

Label the planets correctly.

e

a

b

c

d

f

g

h

Uranus

Mars

Jupiter

Mercury

Earth

Saturn

Venus

Neptune

Tags

NGSS.MS-ESS1-3

Animals can be grouped into vertebrates and invertebrates. Look at the pictures.

Match the statements correctly.

• without

• Vertebrates are animals _______________ a backbone.

• vertebrates.

• The lizard, rhino and fox are

• invertebrates

• The ladybird, worm and butterfly are

• with

• Invertebrates are animals _____________ a backbone.

Not all animals have a skeleton inside their bodies. Some animals have a hard covering on the outside. This hard-covering is called an

Identify the three main functions of the skeleton.

• Balance, flexibility, digestion

• Strength, coordination, respiration

• Protection, absorption, elimination

• Support, protection, movement

Answer explanation

The correct functions of the skeleton are support, protection, and movement.

Murad adds white powder to vinegar in a beaker. The picture shows the white powder reacting with the vinegar. Select all the ways Murad can stay safe when he adds the white powder to the vinegar.

• Wear goggles

• Wear gloves

• Wear a mask

• Wear a lab coat

• None of the above.

Answer explanation

To stay safe when adding the white powder to vinegar, Murad should wear goggles, gloves, a mask, and a lab coat to protect his eyes, skin, and respiratory system from any potential hazards.