Jadee G4S2 Science

Inside all atoms there are (p) ______ and (n) ______ charges.

• positive / negative
• neutral / static
• charges / protons
• protons / electrons

Answer explanation

Atoms have both positive (protons) and negative (electrons) charges.

Atoms normally have no total charge, so we say they are (n) ______.

• neutral
• positive
• negative
• none

Answer explanation

Neutral atoms have equal numbers of protons and electrons.

If two charges are moving towards each other, we can say they (a) ______.

• attract
• repel
• shock
• stick

Answer explanation

Opposite charges attract each other.

If two charges move away from each other, we can say they (r) ______.

• repel
• attract
• charge
• spark

Answer explanation

Same charges repel each other.

(S) ______ electricity can build in a cloud when (i) ______ and water particles rub together.

• static / ice
• electric / water
• energy / heat
• current / vapor

Answer explanation

Static electricity builds when ice and water particles rub in clouds.

Thunder happens when heat causes air to (c) ______ and (e) ______ explosively.

• contract / expand
• melt / boil
• shrink / grow
• collapse / explode

Answer explanation

Thunder results from rapid contraction and expansion of heated air.

Inside all atoms there are (p) ______ and (n) ______ charges.

• positive / negative
• neutral / static
• charges / protons
• protons / electrons

Answer explanation

Atoms have both positive (protons) and negative (electrons) charges.

Atoms normally have no total charge, so we say they are (n) ______.

• neutral
• positive
• negative
• none

Answer explanation

Neutral atoms have equal numbers of protons and electrons.

If two charges are moving towards each other, we can say they (a) ______.

• attract
• repel
• shock
• stick

Answer explanation

Opposite charges attract each other.

If two charges move away from each other, we can say they (r) ______.

• repel
• attract
• charge
• spark

Answer explanation

Same charges repel each other.