Question, Research, Hypothesis, Test Hypothesis, Collect and Analyze Data, Conclusion
100
Element or Compound?
CaFe
What is compound
100
Water has a density of 1.0 g/ml, alcohol has a density of 0.85 g/ml and liquid soap has a density of 1.2 g/ml. If Saul were to pour these liquids into a bottle, which one would be on the bottom, middle and top. Draw a picture.
Liquid Soap on the bottom, Water in the middle and alcohol on top.
100
What is a chemical change?
Elements rearrange to form new bonds and a new substance.
100
This element is the most abundant element in the atmosphere.
What is Nitrogen. Nitrogen makes up 21% of the air I breathe.
200
Brittney and Mirna are investigating chemical changes using various chemicals. List 4 safety precautions that Brittney and Mirna should use.
- Wear goggles, glove, apron
- Wash hands after the lab
- correctly dispose of the chemicals
200
Where can you find a list of elements?
On the periodic table of elements.
200
Explain how Sarahi could measure the volume of an irregular object such as a toy dinosaur.
Use a graduated cylinder and measure the change in water level. Volume= starting volume (mL) - Ending Volume (mL)
200
John and Esmundo put baking soda and vinegar in a cup with a thermometer. They recorded a decrease in temperature. What is the best explanation why they noticed a change.
A. The baking soda disappeared into the vinegar.
B. A physical change occurred.
C. A chemical change occurred
C
200
Name an everyday object that is most likely made of only one element.
Copper wire, Iron rod, pencil lead- graphite
300
Jake and San Juan measured how fast rats could travel through a maze. Each rat traveled through an identical maze. What is the best method for presenting results?
A. Making a list of each rat's time on a chart
B. Making a line graph of each rat's time.
C. Creating a bar graph to compre the times of each rat.
C.
300
What elements comprise the following compound: NaClFeC
Na= Sodium
Cl = Chlorine
Fe = Iron
C = Carbon
300
What is the equation to calculate the density of an object?
Density = Mass / Volume
300
List the chemical changes:
Breaking a glass,
Dissolving sugar in water,
Cooking a cake,
Silver Tarnishing,
Iron Rusting
Cooking a cake, silver tarnishing, iron rusting
300
Most electrical wires such as copper wire have which phycial properties.
Conductors,
Insulators,
Malleable,
Brittle
Ductile
Ductile
Malleable
Conductors
400
Lisa and Jill have just finished an experiment in science class that involved several different chemicals. Which of the following is the BEST way for them to clean up their lab area?
F Ask the teacher to tell them the best way to dispose of the chemicals.
G Mix all of the chemicals together before pouring them down the sink.
H Throw all of the leftover materials into the trash can.
J Leave all of the leftover materials on the lab table.
F
400
Two or more elements chemically bonded together to form a new substance.
What is a compound.
400
What tools are needed to calculate the density of a marble?
A triple beam balance to measure mass. A graduated cylinder to measure volume.
400
Give 2 examples of physical changes taking place.
A physical change does not create a new substance.
400
Rodolfo is conducting an investigation testing the hardness of several minerals on Moh's scale. He noticed Talc has a hardness of 1, Calcite 3 and Quartz 7. Which mineral would easily make a streak on his plate.
Talc because it is the softest mineral.
500
Why is it important to conduct several trials of the same experiment? When conducting an experiment only _____ variables should be changed.
To ensure acurate and valid results. only 1 variable should change.
500
How many atoms of each element in the following compound: C6H12O6
6 Carbon atoms
12 Hydrogen atoms
6 Oxygen atoms
500
Calculate the density of 3 boxes each with a mass of 60 g. Box A has a volume of 6 mL. Box B has a volume of 10 mL. Box C has a volume of 20 mL. Choose the correct conclusion.
A.) All boxes have the same mass and density.
B.) Although all of the boxes have the same mass, Box A has the least volume and therefore the greatest density.
C.) Although all of the boxes have the same mass, Box A has the least volume and the least density.
B. As the volume of the boxes increased the density decreased because there was less matter within a given amount of space.
500
Two mineral samples have the same mass. Which of the following statements is therefore TRUE?
A They are the same size and shape.
B They do not necessarily have the same density.
C They have the same volume.
D They are the same material.
B
500
List 4 Physical properties of Metals.
Solid, Shiny, Conducts electrcity and heat, malleable, ductile,