Science october 19

Question 1

Matter

Answer 1

Anything that has mass and takes up space

Question 2

Substance

Answer 2

A single kind of matter that is pure

Question 3

Element

Answer 3

A pure substance that cannot be broken down into any other substance by chemical or physical means

Question 4

Atom

Answer 4

The smallest piece of an element

Question 5

Molecule

Answer 5

Formed when groups of two or more atoms create chemical
bonds between one another.

Question 6

Compound

Answer 6

pure substances, made from two or more elements

Question 7

mixture

Answer 7

non pure substances, made of two or more substances

Question 8

Mass

Answer 8

The amount of matter in an object

Question 9

The Law of Conservation of Mass

Answer 9

Matter is not created nor is it destroyed during a chemical or
physical change

Question 10

Energy

Answer 10

The ability to do work or cause change

Question 11

Kinetic energy

Answer 11

Energy of moving things

Question 12

Potential Energy

Answer 12

Energy that is stored in an object because of its position

Question 13

Chemical change

Answer 13

when a substance is
transformed into a different substance.

Question 14

Physical Change

Answer 14

Any change that alters the form or appearance of
matter.but doesn’t change that matter from one substance to another.

Question 15

Difference between chemical and physical change

Answer 15

chemical changes the substance itself while physical changes the appearance of the substance.

Question 16

name an example of physical change

Answer 16

solids melting into liquids

Question 17

whats the difference between a compound and a mixture.

Answer 17

mixtures are easily separated while compounds are more difficult

Question 17

Name an example of chemical change

Answer 17

Rusting

Question 18

whats an example of a compound

Answer 18

salt

Question 19

whats an example of a mixture

Answer 19

soil

Question 20

what are some ways to separate a mixture

Answer 20

sifting,distillation, evaporation

Question 21

compare and contrast mass and weight

Answer 21

mass is the amount of matter, and weight is the measure of the force of gravity of an object

Question 22

What are the four states of matter and their properties

Answer 22

Solid-made of particles that are pushed together tightly
Liquids-the particles are further apart than solids
Gas-particles are the farthest apart
Plasma- is formed by superheating any of the other three states of
matter

Question 23

Understand the physical change cycle

Answer 23

solid->liquid->gas
Solids melt turning into liquids, Liquids evaporate turning into gases, Gases condense turning into liquids, Liquids freeze turning into solids

Question 24

whats the difference between thermal energy and temperature

Answer 24

Temperature is a measure of the average energy of a random motion of
particles in matter, and a measure of how much or how little the particles in a
room are moving around

Question 25

difference between endothermic and exothermic change.

Answer 25

endo-A change when energy is taken in
Exo-A change when energy is given off

Question 26

What are the five types of energy, how are they similar and different

Answer 26

Potential Energy-is stored in an object
kinetic-energy of moving things
chemical-is stored in chemical bonds
electromagnetic-travels through space as waves
electrical-electrical charge particles moving from one place to another

Question 27

how are the particles of matter arranged in all four states of matter.

Answer 27

gas-spread out
solid-particles pushed together
liquid-further apart than solids
plasma-positively charged ions and negatively charged particles

Question 28

list all the types of energy

Answer 28

-potential
-kinetic
-chemical
-electromagnetic
-electrical