Unit 13

Every element has a spectrum with an unique arrangement of _______ - it's like their own fingerprint!

• electrons

• colors

• books

• music

Tags

NGSS.HS-PS1-1

True or false: Because the moon's rotational period is the same as its revolution, one side of the moon always faces Earth.

• True

• False

Tags

NGSS.MS-ESS1-1

The compass needle is a small magnet with north and south poles. Which pole points towards the north?

• The north pole

• The south pole

• The west pole

• The east pole

Why does the compass needle turn? Choose the correct explanation from the list below.

• The ends of the compass needle are painted different colours

• The case of the compass is made of a magnetic material

• The Earth has magnetic field

• The Earth rotates on its axis once each day

Select the subatomic particle that has a mass of 1 AMU.

Tags

NGSS.MS-PS1-1

This illustration is a/an _____________

• compound

• element

• mixture of elements

• mixture of elements and compounds

Tags

NGSS.MS-PS1-1

State whether the magnets will attract or repel each other.

• attract

• repel

Tags

NGSS.3-PS2-3

What happens when 2 north poles of magnets are facing each other?

• It splits in half

• They repel

• They attract

• Nothing

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What does the Big Bang Theory (BBT) state?

• That an explosion created humans on Earth.

• That the universe is small

• That everything in the universe was once concentrated into one dense point that expanded outwards

• That nothing existed at the start of the universe

Answer explanation

The Big Bang Theory states that everything that would become all the energy, matter, and space in the universe was once concentrated into one dense point that expanded outward, forming the universe.

Tags

NGSS.HS-ESS1-2

What does the Nebula Gas Theory state?

• That the solar system formed from a nebula

• That the universe was created from a single point

• That the solar system is not held together by gravity

• That the Earth is the center of the universe

Answer explanation

The Nebula Gas Theory (NGT) states that the solar system formed from a giant cloud of molecular hydrogen, dust, and helium. (Nebula) Because all nebulae rotate, their gases and dust particles move around a central point.

Tags

NGSS.MS-PS2-4