WorksheetsLab Safety and Processes Review
Total questions: 17
Worksheet time: 17mins
What is the proper technique for smelling a chemical during a lab investigation?
Place the material beneath your face and blow down on it.
Tilt the material toward your nose and sniff the fumes directly.
Pour some of the chemical on a paper towel and smell the paper towel.
Pour some of the chemical on a paper towel and blow the smell towards your nose.
Which of the following is a safety practice you should perform immediately after each classroom laboratory?
combing your hair
eating a snack
resting your eyes
washing your hands
You are working in the science lab with chemicals. After the lab is over, you have some chemicals left over that you did not use. What should you do with the leftover chemicals?
Pour them all down the sink drain.
Ask your teacher how to dispose of them.
Pour them all in a beaker and leave it out for someone else to dispose
Put them back in their bottles so they can be used again later
In which of the following situations would wearing safety goggles help to prevent injury?
if you break an empty test tube
if you accidentally splash some chemicals in your face
if you spill some liquids onto your clothing
if you spill some liquids onto your clothing
Which of the following actions is dangerous and should be avoided during a laboratory?
observing a chemical reaction
stirring chemicals with a glass rod
tasting a chemical during a lab
using a hot plate to warm a chemical
Your class will be working on a scientific investigation outdoors. What should you do that will demonstrate safe practices?
Bring along some camping gear.
Wear shorts and sandals
Do not wear gloves and never bring bottled water.
Put on sunscreen and never taste anything outdoors.
Running around and horseplay are acceptable behaviors when doing lab activities.
True
False
When I complete my lab, it is safe for me to try different experiments with the extra chemicals and materials.
True
False
A class is doing a lab experiment that involves a powdery, or dusty, substance. What protective equipment should a student put on before the experiment begins?
Goggles
Mask
Any other item the teacher thinks is necessary
All of These
During a lab, a glass beaker falls onto the floor and breaks. What should you do?
Run around and find the teacher
Pick up the broken glass
Stay calm and get the teacher's attention so he/she can help you
Try and cover up the accident so no one will notice
A student conducts an investigation to learn how materials conduct heat. The student places a wooden spoon and metal spoon in identical containers of hot water. Then the student take the temperature of the water in each container to make sure both are the same temperature. What is the variable in the student's investigation.
The temperature of the water
The type of container
The length of time the student leaves the spoons in the water
The type of spoon
What is the length of the line?
2.0 cm
2.1 cm
3.0 cm
2.3 cm
The things that are changed in an experiment that can affect the results are called ____________.
Materials
Processes
Variable
Sections
What is the length of the line to the nearest centimeter?
4 cm
7 cm
6 cm
5 cm
What is the total length of the two rulers to the nearest centimeter?
4 cm
8 cm
6 cm
9 cm
Jose tests the effects of fertilizers on four seeds of the same kind of plant. He gives each plant the same amount of water and sun. The table below shows his results. What can Jose conclude about the fertilizers?
Fertilizer 2 has more of the nutrients the plant needs.
Plants produce thicker stems without fertilizers
Fertilizer 3 does not help plants grow taller
Plants grow taller with Fertilizer 1 than they do with Fertilizer 2.
Analyze and evaluate the information to answer questions 17.
Abe built this set up to investigate how the toy car would travel after it left the ramp. He used a meter stick to measure the distance.
The toy car would have traveled farther if Abe had used a different ramp.
Adding two books to the height double the distance the toy car traveled.
A toy car will travel 6 meters if there are 8 books underneath the ramp.
The greater the number of books under the ramp, the farther the car traveled
