Hydrogen and helium

Hydrogen and oxygen

Hydrogen and carbon

Hydrogen and nitrogen

They react cause a gas and blow up the balloon

They react cause a explosion and the balloon disappeared

Nothing happens

They react but do not blow up balloon

Neutrons and Protons

Neutrons and electrons

Protons and electrons

Symbol, atomic number, atomic weight, period and group.

Symbol, weight number, atomic weight and group.

Symbol, atomic number and group.

The outside of a cold glass on hot day

Morning dew on grass

Car window on cold day

Bathroom mirrors

All of the above

Carbon

Nitrogen

Neon

Boron

Oxygen

Iron

Magnesium

All of the above

studies the properties of matter and how matter interacts with energy.

the study of living things.

the study of the Universe and everything in it, including planets, stars, galaxies, comets, and black holes.

To describe what an object looks like

To describe how much an object weighs.

to describe how much space an object or substance takes up (its volume) in relation to the amount of matter in that object or substance (its mass)

To describe how much a object weighs in relation to how it looks.

Air like substances that don't move.

Soft substances that are squishy

Heavy substances that can change shape.

are air-like substances that can move around freely.

Objects that don't move much and change when hot.

are objects that keep their own shape and do not flow in a given temperature.

Are objects that are soft and squishy.