Spanish AR verbs

Since the Big Bang, the universe has been____1____ and becoming _____2___dense

1. cooling 2. less

What is the age of the universe?

10-15 billion years old

In the beginning, how did scientists view the universe?

Infinite and Ageless

Do protons and neutrons have the same mass?

Yes

What did Edwin Hubble discover?

An expanding universe- galaxies moving apart

Everything in our Universe is made up of what

Atoms

Which elements were the first elements in the universe?

Hydrogen and Helium

All elements are made of?

Elements

Do electrons closer to the nucleus have higher or lower energy than the electrons in the outer shell?

Lower

What type of charge do electrons have?

Negative Charge (-)

What type of charge does a neutron have?

Neutral

Do electrons have the same mass as the protons and neutrons?

No

Where is the majority of mass in an atom?

Nucleus

Electrons are found..

Orbiting around the nucleus

What type of charge does a proton have?

Positive Charge (+)

What is found in the nucleus of atoms?

Protons and Neutrons

Atoms are made up of smaller particles called..

Subatomic Particles

What are at atoms?

Tiny particles that cannot been seen with the naked eye

Electrons need a certain amount of energy to stay in certain shells.

True