Density 1
What is the density of a piece of gold that has a volume of 1.68 cm3 and a mass of 32.4g?
19.29 g/cm3
What is the density of a liquid that has a volume of 20.1 ml and a mass of 12.44 g?
0.62 g/ml
The amount of matter in an object is a measure of the object's ________________.
mass
What is your educated guess called?
Hypothesis
A scientist has a mixture of small pieces of iron, water, sugar, and salt. What physical property could they use to best separate the iron from the other ingredients?
Magnetism
What is the density of a substance with a mass of 3.2g and a volume of 240 ml?
0.01 g/ml
What is the density of a substance with a mass of 3.2 g and a volume of 25 cm3.
0.13 g/cm3
What do you call it when a scientist is trying to prove another lab was done correctly?
replication
What 4 parts should always be included in a good hypothesis? (Name them in the correct order)
If, independent variable, then, dependent variable
If two llamas that weigh the same on Earth are weighed on the Moon, would the results be similar as on Earth, and why?
Yes, because the llamas will still have the same masses as on Earth.
The mass of a sample of chlorine is determined to be 7.2 g. The volume of the sample is determined to be 3.21 ml. What is the density of the sample?
2.24 g/ml
An unknown gas has a mass of 0.125 g and a volume of 2.0 cm3. What is the density?
0.06 g/cm3
Mrs. Henley and her pet llama Kevin have 4 objects made of different materials and together they sort them into two groups using one physical property.
Group 1: Foil & A penny
Group 2: Glass cup & A plastic container
Which physical property did Mrs. Henley and Kevin most likely use to sort the objects into two groups?
Electrical Conductivity
A scientist conducted an experiment and his hypothesis was not supported by his results. How is his hypothesis beneficial even though it was NOT supported by the data?
It leads to more investigations
Name an action that will change the weight of an object, but not its mass?
placing the object on the moon
A piece of wood measures 2.5 cm x 8.1 cm x 3.6 cm and has a mass of 80.0 g. What is the density of the wood?
1.12 g/cm3
Mass = 26.76 g
Volume = 3.00 cm3
Density of copper = 8.92 g/cm3
Density of gold = 19.3 g/cm3
Density of platinum = 21.4 g/cm3
What is the substance?
Copper
Which state of matter has the highest energy?
Gas
What is the difference between qualitative and quantitative data?
Qualitative data is collected using your 5 senses while quantitative data is collected using measuring instruments. (Quantitative data can be graphed while qualitative cannot)
In an experiment, how would a conclusion be stated if the results match the hypothesis?
The results support the hypothesis.
Osmium has a density of 22.6 g/cm3. What is the mass of a block of osmium that is 2.45 cm x 0.140 cm x 0.253 cm?
1.96 g
A piece of zinc is found to have a mass of 12.65 g. The density of zinc is 6.22 g/cm3. What is the volume?
78.68 cm3
What is the Law of Conservation of Mass?
Matter can not be created or destroyed
When completing an experiment, you are testing your hypothesis. What are the three kinds of variables that you need to identify in your experiments?
independent, dependent and controlled
Mrs. Henley hypothesizes that a bar of soap is denser than salt water. While testing this hypothesis, she finds during each of three trials that the bar of soap sinks when placed in a glass of tap water, yet it floats when placed in salt water.
Which is the most appropriate conclusion based on the results of Mrs. Henley's experiment?
The results fail to support the hypothesis