Sc.8.P.8.8
Quiz
•
Chemistry
•
8th Grade
•
Practice Problem
•
Hard
Standards-aligned
Charles Martinez
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10 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Sean stirred 10 grams of sand into 50 mL of water and 10 grams of salt into 50 mL of water, the he let both mixtures sit for 10 minutes. Which of the following differences did Sean observe between these two mixtures?
The salt, sand, and water do not mix together.
Salt dissolves in the water, but sand does not.
Mixture 2 can be separated, but Mixture 1 cannot.
Mixture 1 is a solid and a liquid, but Mixture 2 is not.
Tags
NGSS.MS-PS1-2
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Melanie is given an unknown substance by her teacher. Melanie’s teacher tells her that the substance has a bitter taste. Melanie also observes that the substance is slippery. These properties indicate that the substance may be which of the following?
Acid
Salt
Water
Base
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
While elements and compounds are related, they are different. Unlike elements, which of the following describes a compound?
Consists of only one type of atom
Is the smallest form of a particle
Always exists in the gas state of matter
Is made of at least two types of matter
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Acids and bases are compounds with very different properties. Which of the following is a property of an acid as opposed to a base?
Reacts with most metals
Has a pH above 7
Feels slippery
Is soluble in water
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Provided is a table of five different substances. How many of these substances are pure substances?
2
3
4
5
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Kathy is doing an investigation in science class, and she needs to use a base. Kathy can identify a base by finding a substance with which of the following properties?
Reacts with most metals
Tastes sour
Has a pH above 7
Is safe for humans to drink
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Pure substances include elements and compounds. Which of the following describes an element as compared to a compound?
Simplest form of matter
Mixture of an acid and base
A solution with a solute
Made of more than one kind of atom
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