Vocab

Question 0

What is mass?

Answer 0

• how heavy something is, in grams (g)

- same everywhere

Question 1

What is matter?

Answer 1

• anything that has mass
• anything that takes up space
• NOT: heat, light, EM radiation

Question 2

What is weight?

Answer 2

• mass • gravitational force

- changes on where you are

Question 3

What are atoms?

Answer 3

• matter is made up of atoms
• atoms are made up of protons, neutrons, and electrons
• p has positive electric charge
• n has no electric charge
• e has negative electric charge
• different types of atoms = elements
• substances of only one type of atom cannot be broken down
• atomic number = # of p
• # of p = # of e
• atomic mass - atomic number =
  # of neutrons

Question 4

What is density?

Answer 4

the comparison of how much matter there is in a certain amnt.

Question 5

How do you find density?

Answer 5

mass
d = ———
volume

Question 6

How do you know if an object will sink or float when it’s surrounded by water?

Answer 6

• if the object’s density is over 1g/mL, then it will sink

- if the object’s density is under 1g/mL, then it will float

Question 7

What is the Core-Accretion model & how does it suggest the Earth was formed?

Answer 7

• the Core-Accretion model is a theory of how the solar system was formed
• 13 BYA, there was just a cloud of gas, ice, dirt, and dust
• a nearby star exploded
• that explosion sent shock waves, or solar wind, towards the cloud
• because of the wind, the cloud started spinning and swirling
• the center got super hot & dense and our sun was formed
• the rest cooled and started going into clumps & solids
• those formed into the planets of our solar system