Matter and energy

Question 1

What does COAST stand for?

Answer 1

-Collect and Organize
-Analyze
-Solve
-Think about it

Question 2

what are elements?

Answer 2

anything on the periodic table

Question 3

what is a compound?

Answer 3

made of more than one element chemically bound together

Question 4

what is a mixture?

Answer 4

more than one element/compound

Question 5

what is a homogenous mixture?

Answer 5

uniform throughout

Question 6

what is a heterogenous mixture?

Answer 6

not uniform throughout

Question 7

what are the properties of a solid?

Answer 7

same shape and volume regardless of container

Question 8

what are the properties of a liquid?

Answer 8

indefinite shape and constant volume

Question 9

what are the properties of a gas?

Answer 9

indefinite shape and volume

Question 10

what are physical properties?

Answer 10

anything measured or determined about something that does not change

Question 11

what are the rules for significant figures (4)?

Answer 11

1. zeros at the beginning of the value are never significant because all they do is set the decimal place
2. zeros after a decimal place and after a nonzero digit are always significant
3. zeros at the end of a value that contains no decimal point are not significant. They are significant if there is a decimal place
4. zeros between significant digits are always significant

Question 12

what is density?

Answer 12

mass per unit volume physical property

Question 13

1 gigameter = ____ meters

Answer 13

1 x 10^9 meters

Question 14

1 meter = _______ picometers

Answer 14

1 x 10^12 picometers

Question 15

1 meter = _____ nanometers

Answer 15

1 x 10^9 nm

Question 16

1 megameter = _____ meters

Answer 16

1 x 10^6 meters

Question 17

1 kilometer = _____ meters

Answer 17

1000 meters

Question 18

1 meter = _____ centimeters

Answer 18

100 cm

Question 19

1 meter = _____ millimeters

Answer 19

1000 mm

Question 20

1 meter = _____ micrometers

Answer 20

1 x 10^6 um

Question 21

what type of mixture would tomato soup be?

Answer 21

homogenous

Question 22

what type of mixture would chicken noodle soup be?

Answer 22

heterogenous

Question 23

what is 3 meters in millimeters

Answer 23

3000 mm

Question 24

how many meters are in 40000 kilometers?

Answer 24

4 x 10^7

Question 25

what is 3 meters in millimeters

Answer 25

3000 mm

Question 26

how many meters are in 40000 kilometers

Answer 26

4 x 10^7 m

Question 27

physical or chemical: burning wood

Answer 27

chemical

Question 28

physical or chemical: dying water green

Answer 28

physical

Question 29

extensive properties of a pure substance depend on sample size whereas intensive properties are characteristic of that substance. Which of these properties are intensive? -color -mass -density

Answer 29

color and density

Question 30

identify the best match between the dimension/quantity and its correct SI base unit a. mass and gram b. length and kilometer c. time and minute d. temperature and celsius e. amount of substance and mole

Answer 30

e. amount of substance and mole

Question 31

which of the following shows the correct relationship between these metric units of length or distance? a. 1 km = 100 m b. 1mm = 10 cm c. 1 nm = 10^9 m d. 10^6 um = 1 m

Answer 31

d. 10^6 um = 1 m