What safety equipment should be worn at all times while working with chemicals in thelaboratory?

8th Grade Science Questions

Quiz
•
Moral Science
•
6th - 8th Grade
•
Medium
JOSEPHINE D
Used 2+ times
FREE Resource
14 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
apron
gloves
goggles
lab coat
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
You observe a dog chasing a ball. Which of the following is a valid hypothesis for this observation?
If a ball is thrown, then the dog will chase it
If a ball is thrown, then the dog will be happy
A dog always chases a ball in motion.
When you throw the ball the dog is happy.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is one advantage and one limitation of using a model of an atom like the one pictured below?
One advantage is the model illustrates the different parts of the atom. One limitation is the model is not to scale.
One advantage is the model is to scale. One limitation is that the model does not illustrate the different parts of the atom.
One advantage is that the model materials accurately represent the substances in an atom. One limitation is the size of the model, since atoms cannot be seen by the naked eye.
One advantage is the model illustrates the relative masses of each part of the atom. One limitation is the model is not to scale.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jackson is designing an experiment to test the temperature at different times of the day. For each trial, he plans to collect data for 15 minutes. What equipment will he need to implement this experiment?
Meter stick, spring scale, and test tube
Timing device, computer, and meter stick
Thermometer, timing device, and lab journal
Lab journal, timing device, and psychrometer
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Determine if the following chemical equation satisfies the law of conservation of mass: C +S 8 --- 4 CS 2
It is not balanced. In order to support the law of conservation of mass the equation should read: 4 C + S 8 --- 4 CS 2.
It is balanced and it supports the law of conservation of mass; matter cannot be created or destroyed.
It is not balanced. In order to support the law of conservation of mass the equation should read: C + 2 S 8 --- 8 CS 2.
It is balanced and it supports the law of conservation of mass; energy cannot be created or destroyed
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which substance does the chemical formula Na2 S represent and how many atoms does it contain?
Sodium sulfide; 2
Sodium sulfide; 3
Nitrogen sulfide; 2
Nitrogen sulfide; 3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a measure of velocity?
A cheetah is running at a rate of 7 m/s
A bike is slowing at a rate of 1.5 m/s 2 to the east
A cat is walking at an angle of 60 degrees
A dog is running at a rate of 2 m/s to the east
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