Which is an example of a chemical change? Explain why?
frying an egg, boiling water, breaking a glass cup, crushing a piece of bread
frying egg
100
Name the three states of matter
What are solid, liquid, gas
100
What is the weight of an 30 Kg object on earth? Write the correct units.
30 X 10 = 300N
100
How could you find density of an object?
m/V
100
Find the volume of a cube with side 6cm.
6X6X6 =
200
Which best explains why melting ice cream is a physical change?
Which best explains why melting ice cream is a physical change? It changes from a liquid to a gas ; A new substance is not produced; It does not produce a bad smell.
200
Matter is...
Define
What is ....anything that has mass and takes up space
200
Find the weight of a 30 kg object on the moon. The gravity on moon is 1.6 N/Kg
48 N
200
If an object sinks in water, what can you say about its density?
its greater than 1g/cc
200
Explain the steps to find the volume of an irregular shaped object.
graduated cylinder
300
Which example is best described as a chemical change?
water evaporating; ice cream melting; iron rusting outside
Explain why?
What is "iron rusting outside" Rust is a new substance on the metal...
300
In this state, matter has no definite shape, no definite volume, and the molecules are far apart
What is gas
300
Will an object have the same mass and weight on Earth and Jupiter? Explain
same mass but different weight
300
You poured three liquids, red, blue, and green and the red liquid floats on the top.
What can you say about the density of the red liquid compared to the other two liquids?
red has a lower density
300
What could to use to measure the mass of an object?
Triple beam balance
400
Which is an example of a physical change? (A) ice melting into water; (B) fire burning a sheet of paper; (c) a nail rusting after being outside; (d)a penny turning green when placed
What is (A) ice melting into water...b/c you can reverse it by freezing it again
400
The gravitational pull on an object is the object's ________.
What is WEIGHT. Your weight will change on the moon bc of the gravitational pull, but you mass (the amount of matter you are made of) will remain the same
400
Find the gravity on a planet where a 300 kg object weighs 900N.
3 N/kg
400
An object has a mass of 450 g and volume of 9 cc. Find its density with the correct units.
50 g/cc
400
What temperature is absolute zero? Explain
0 K
500
Which will most likely result in a new substance being formed? (A ) boiling water; (B) cutting paper; (C) lighting a match; (D) mixing water and clay
What is (C) lighting a match..the resulting change in color of the match is a clue to a chemical change
500
The 3 physical properties of matter are...
What are...shape, mass, and volume
500
An object has a density of 25 g/cc, if its volume is 200 cc find its mass.