Chemistry Unit Retest

Quiz
•
Science
•
7th Grade
•
Hard
+3
Standards-aligned
Ruby Lopez
Used 2+ times
FREE Resource
18 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the experiment, the __________ tablet dissolved the fastest because it had the __________. Which terms best complete the sentence?
crushed; highest surface area
whole; lowest surface area
crushed; highest temperature
whole; highest surface area
quartered; lowest concentration
Tags
NGSS.MS-PS1-2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement best describes the concentration of the solutions made from the dissolved vitamin C tablets?
The solution with the whole tablet has the highest concentration because the tablet was in one piece.
The solution with the crushed tablet has the lowest concentration because the tablet was in many pieces.
All three solutions had a concentration of zero because the tablets completely dissolved in the water.
All three solutions have the same concentrations because the amounts of water and solute were the same.
Tags
NGSS.MS-PS1-2
3.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Which two experiments would examine ways to change the rate of dissolution?
Use crushed, quartered, and whole tablets with varying sizes.
Use a crushed, quartered, and whole tablet, and measure the amount of water evaporated following heating.
Use full tablets in each trial but use a different temperature of water for each container.
Use full tablets in each trial, but increase the amount of water used to dilute the Vitamin C tablet.
Use full tablets in each trial and stir each tablet a different number of times when dissolving.
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Image A and image B show two different substances. Which of the following statements accurately describe the two substances? Choose two answers.
Images A and B are both composed of carbon and oxygen.
Images A and B are both molecules containing 2 atoms of oxygen.
Images A and B are both compounds containing only 2 atoms of oxygen.
Image A is an element and image B is a compound.
Image A is a compound and image B is an element.
Tags
NGSS.MS-PS1-1
NGSS.MS-PS1-2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An antacid is a medication that is used to help calm heartburn. Some antacid tablets contain two compounds that dissolve when the tablet is placed in water. When these compounds dissolve into solution, they react with each other and form two different compounds, one of which is carbon dioxide (CO₂) gas. The person then drinks the dissolved solution. This type of antacid tablet is a __________ that dissolves into the _______, water. This is a __________ change. Once in solution, the __________ react to form a gas which is evidence of a __________ change. Which terms best complete the sentences?
molecule; solute; chemical; solvents; physical
solvent; solute; chemical; molecules; physical
solute; molecule; chemical; solvents; physical
solvent; solute; physical; molecules; chemical
solute; solvent; physical; molecules; chemical
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Compare the four solutions in the diagram in terms of the amount of solute and the volume of the solutions. Solution ________ is the most concentrated solution. Solution ________ is the most diluted solution. Solution B has the same concentration as solution ________. Which order of letters accurately completes the sentences?
A. B; A; C
B. A; D; C
C. D; A; C
D. B; C; A
Tags
NGSS.MS-PS1-2
7.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
A glass of lemonade with ice in it sits outside in the Texas summer heat. Before long the ice begins to melt. Which of the following has occurred? Select two answers.
A. The ice has melted, which is a chemical change.
B. The ice has melted, which is a physical change.
C. The lemonade has been diluted by the water from the melting ice.
D. The water from the melting ice has been diluted by the lemonade.
E. The water from the melting ice has not diluted the lemonade.
Tags
NGSS.MS-PS1-4
NGSS.MS-PS3-4
NGSS.MS-PS3-5
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