Mosa Mack CER Live Video Quiz

Joel claims that “Bright White Toothpaste” removes tooth enamel stains better than all other brands. Which of the following should be documented as evidence to support his claim?

• The amount of toothpaste used

• The shade of teeth before and after brushing

• The type of toothbrush used to brush teeth

• The size of tooth

All of the following are quantitative observations in a chemistry experiment except for:

• 10 g of powder remained after the chemical reaction

• The starting volume of Solution A is 40 mL

• The temperature rose to 85 degrees Fahrenheit during the chemical reaction

• Bubbling and fizzing occurred when Solution A was applied to the powder

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True or False: In a controlled experiment, more than one variable should be changed in order to conduct an accurate experiment.

• True

• False

Sally wants to determine if Shout stain remover is more efficient than OxiClean stain remover. In order to conduct an accurate experiment, all of the following variables need to stay the same except:

• Type, size, and placement of stain

• Shirt size and material

• Volume and temperature of water

• Type of stain remover

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Which of the following could be a hypothesis for a plant growth experiment?

• Suspend bulbs 30 cm over tomato plants

• The average “white light” plant produced 8 ripe tomatoes over a 90 day period

• If tomato plants are grown under red light, then enhanced plant growth and fruit production will occur

• Red-colored light enhances tomato plant growth

The statement “Flex Tape is a super-strong, rubberized, waterproof tape that can patch, bond, seal, and repair virtually everything” is an example of:

• Reasoning

• A claim

• Evidence

• A hypothesis