Section 2.1
Write the rational number as a decimal.
5/9
0.5 (5 repeating)
1.6 + (-19.8)
18.2
7/3 - 8/15
1 4/5
-3/7 ÷ 11/35
1 4/5
What are the states of matter (not including plasma)?
Solids, liquids, and gases.
Write the rational number as a decimal.
-2 1/3
-2.3 (3 repeating)
-18.02 + 15.68
-2.34
1 5/6 - (-2 1/4)
4 1/12
-1/9 ÷ (-13/30)
1/3
Which state of matter has particles that are vibrating, in constant motion, but packed tightly together?
Solids
Write the decimal as a fraction or mixed number in simplest form.
0.52
13/25
-2 2/5 + 1 2/3
-11/15
-102.431 - (-59.95)
-42.481
-3/14 x 21/12
-3/8
What happens to particles in matter when you add thermal energy?
The particles begin to move faster and move apart.
Write the decimal as a fraction or mixed number in simplest form.
-4.18
-4 9/50
Your banking account balance is -$1.56. You deposit $10. What is your new balance?
$8.44
Find the distance between these numbers.
-3.1, -5.7
2.6
There are 15 people in a room. Each person ate 2/3 of a pizza. There was no pizza remaining. How many pizzas were in the room?
10 pizzas
What is an example from real life where matter changes states?
Water cycle, volcanic eruption/lava cooling, condensation on windows, boiling/water vapor, ice melting in a drink, butter melting in a hot pan, making ice cream, bodies of water drying up, cluds
You receive two quarters, one dime, and four pennies back in change.
Write the amount as a decimal.
Write the amount as a fraction in simplest form.
0.64 and 16/25
You mow 1/3 of the lawn. Your sister mows 2/7 of the lawn. What fraction of the lawn is mowed?
13/21
Mary filled a water cooler with 6 1/2 gallons of water. She forgot to close the plug and 2 5/6 gallons leaked out. How many gallons remain in the cooler?
3 2/3 gallons
How many three-quarter pound burgers can be made with twelve pounds of hamburger?
16 burgers
Which state of matter is usually the most dense?
Solids, unless it's solid water (ice). Liquid ice is denser than solid ice.