U1 Final Mastery Quiz: Physical vs. Chemical & Variables

Last updated over 2 years ago

8 questions

3

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U1 Final Mastery Quiz: Physical vs. Chemical & Variables

Last updated over 2 years ago

8 questions

I. Experimental Variables Section
For the following two lab scenarios, identify the independent, dependent & control variables.

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Experimental Design Scenario 1:
Investigation Question: Do tomatoes grow fastest under fluorescent, incandescent, or natural light?
Experimental Method: Get 3 of the same tomato plants planted in the same soil in the same temperature room. Water them at the same time one time per day with 100 mL of water. Place one plant under fluorescent light, one under incandescent light, and the last one under natural lights. Measure and record the plants growth with a ruler at the end of each day.
The independent variable is: _______ 
The dependent variable is: _______ 
Some control variables are: _______ _______ _______ _______ 

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Experimental Design Scenario 2:
Investigation Question: What concentration (amount) of salt water boils the fastest?
Experimental Method: Get 3 same-sized beakers and fill each beaker with 100 mL of the same source of water using a graduated cylinder. Heat the hot plate to 250℃. Measure 1.0 g of salt using the balance and add it to one of the water-filled beakers. In another beaker, add 5g of salt. In the third beaker, add 10g of salt. Measure how long it takes for the water to boil for each beaker using the hot plate.
The independent variable is: _______ 
The dependent variable is: _______ 
Some control variables are: _______ _______ _______ _______ 

II. Physical vs. Chemical Changes Section

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I. Experimental Variables Section
For the following two lab scenarios, identify the independent, dependent & control variables.

Experimental Design Scenario 1:
Investigation Question: Do tomatoes grow fastest under fluorescent, incandescent, or natural light?
Experimental Method: Get 3 of the same tomato plants planted in the same soil in the same temperature room. Water them at the same time one time per day with 100 mL of water. Place one plant under fluorescent light, one under incandescent light, and the last one under natural lights. Measure and record the plants growth with a ruler at the end of each day.
The independent variable is: _______ 
The dependent variable is: _______ 
Some control variables are: _______ _______ _______ _______ 

Experimental Design Scenario 2:
Investigation Question: What concentration (amount) of salt water boils the fastest?
Experimental Method: Get 3 same-sized beakers and fill each beaker with 100 mL of the same source of water using a graduated cylinder. Heat the hot plate to 250℃. Measure 1.0 g of salt using the balance and add it to one of the water-filled beakers. In another beaker, add 5g of salt. In the third beaker, add 10g of salt. Measure how long it takes for the water to boil for each beaker using the hot plate.
The independent variable is: _______ 
The dependent variable is: _______ 
Some control variables are: _______ _______ _______ _______ 

II. Physical vs. Chemical Changes Section

Which of the following is an example of physical change?

A glass cup falls from the counter and shatters on the ground.

Baking a birthday cake for your mother.

Mixing baking soda and vinegar together, and this causes bubbles and foam.

Lighting a piece of paper on fire and the paper burns up and leaves ashes.

Which of the following is an example of physical change?

Mixing baking soda and vinegar together, and this causes bubbles and foam.

A glass cup falls from the counter and shatters on the ground.

Baking a birthday cake for your mother.

Lighting a piece of paper on fire and the paper burns up and leaves ashes.

Which of the following is an example of chemical change?

A plant collecting sunlight and turning it into glucose (food).

Filling up a balloon with hot air.

Your dog ripping up your homework.

Taking a glass of water and freezing it by placing it in the freezer.

What characteristic best describes what happens during a physical change?

A. both the appearance of a substance and its identity change.

B. Chemical composition of substance stays the same

C. the appearance of a substance changes but its identity does not.

D. Both choices B and C

Which is NOT usually a clue that could indicate a chemical change has occured?

No new substance is formed

Change in color

Energy changes are present

Odor or smell is present

What evidence BEST supports the claim: “Students should be involved in school activities.”

According to a student, students have too many chores at home.

According to one parent, being involved in activities may cause students to be injured.

According to the National Teacher's association, students who are in activities receive better grades on average and have lower absence rates.

According to the U.S. Bureau of Economics, activities could cost a family $200 per child.

Which of the following is an example of physical change?

A glass cup falls from the counter and shatters on the ground.

Baking a birthday cake for your mother.

Mixing baking soda and vinegar together, and this causes bubbles and foam.

Lighting a piece of paper on fire and the paper burns up and leaves ashes.

Which of the following is an example of physical change?

Mixing baking soda and vinegar together, and this causes bubbles and foam.

A glass cup falls from the counter and shatters on the ground.

Baking a birthday cake for your mother.

Lighting a piece of paper on fire and the paper burns up and leaves ashes.

Which of the following is an example of chemical change?

A plant collecting sunlight and turning it into glucose (food).

Filling up a balloon with hot air.

Your dog ripping up your homework.

Taking a glass of water and freezing it by placing it in the freezer.

What characteristic best describes what happens during a physical change?

A. both the appearance of a substance and its identity change.

B. Chemical composition of substance stays the same

C. the appearance of a substance changes but its identity does not.

D. Both choices B and C

Which is NOT usually a clue that could indicate a chemical change has occured?

No new substance is formed

Change in color

Energy changes are present

Odor or smell is present

What evidence BEST supports the claim: “Students should be involved in school activities.”

According to a student, students have too many chores at home.

According to one parent, being involved in activities may cause students to be injured.

According to the National Teacher's association, students who are in activities receive better grades on average and have lower absence rates.

According to the U.S. Bureau of Economics, activities could cost a family $200 per child.