Matter

Question 1

how are molecules held together

Answer 1

a molecule is made of two or more atoms held together by chemical bonds

Question 2

what is the difference between an element and a compound

Answer 2

Element cannot be broken down and a compound can and a compound is made of element

Question 3

What are four methods of separating mixtures

Answer 3

magnetic attraction, evaporation, filtration, including distillation

Question 4

What is a heterogenous mixture and a homogenous mixture

Answer 4

homogenous— cannot see different parts of a mixture////// heterogenous—- can see different parts of a mixture

Question 5

What is an atom

Answer 5

is the basic particle from which all elements are made

Question 6

How can volume be determined in a regular shaped object? Irregular
object? How are the units different?

Answer 6

Volume in a regular shaped object- lxwxh …… Volume in an irregular object- fill a graduated cylinder with liquid and put the object inside and calculate the difference……. Cubic centimeters is the difference between mL and centimeters

Question 7

Which number is the metric system based on?

Answer 7

10

Question 8

How do you determine if an object will float in another object?

Answer 8

First you calculate both of the objects density, then the object with the least amount of density will float.

Question 9

What is the SI unit of mass?

Answer 9

kilogram

Question 10

What are the two units for volume?

Answer 10

Cubic meter and cubic centimeter

Question 11

How do you find the density of an object? Be able to use the formula
for density.

Answer 11

You divide the objects mass by volume

Question 12

What is energy?

Answer 12

energy- the ability to do work or cause change

Question 13

What are the three most familiar states of matter?

Answer 13

solid, liquid, gass

Question 14

What is tarnishing?

Answer 14

slow combination of a bright metal with sulfur or another substance, producing a dark coating on the metal

Question 15

Melting, freezing, boiling, and evaporating are all what type of
changes?

Answer 15

physical changes

Question 16

Every form of matter has two kinds of properties, they are?

Answer 16

Physical properties and chemical properties

Question 17

Scientists know that all matter in the universe is made of more than _____ different substances called ________

Answer 17

100,, elements

Question 18

A mixture can be _______ or ________

Answer 18

Homogenous,,,,,,heterogenous

Question 19

The si unit of mass is the________

Answer 19

Kilogram

Question 20

The si unit of volume is the _______ _______

Answer 20

Cubic meter

Question 21

Every chemical and physical change in matter includes a change in _______

Answer 21

Energy

Question 22

A chemical reaction is another name for a ________

Answer 22

Chemical change

Question 23

What are examples of physical and chemical properties?

Answer 23

physical——texture, form, color, appearance, ability to conduct heat, flexibility/////////// chemical——-tarnish, rust, flammability