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# Which of the following is an unsafe lab practice? - PowerPoint PPT Presentation

Which of the following is an unsafe lab practice?. Tie your hair back Rinse hands after an experiment Wear goggles Heat chemicals in a closed beaker.

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Which of the following is an unsafe lab practice?

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## Which of the following is an unsafe lab practice?

Rinse hands after an experiment

Wear goggles

Heat chemicals in a closed beaker

A teacher wants to test the effects citrus air freshener has on class performance. Which of the following would be the BEST test for her investigation?

Measure the amount of air freshener

Compare grades before and after the use of air freshener

Look at students grades on new test

Greg is testing the effect fertilizer has on pumpkin growth. His experiment requires 20 pumpkins. 10 pumpkins were given the 10 mL of water and 10 mL of fertilizer. How can this experiment be strengthened?

By increasing amount of sun

By measuring all the pumpkins

By using different fertilizers

Greg is testing the effect fertilizer has on pumpkins. His experiment requires 20 pumpkins. 10 pumpkins were given the 10 mL of water and 10 mL of fertilizer. What should be done with the other 10 pumpkins?

Add 10 mL of a different fertilizer

Don’t water them

Give them 10 mL of sugar and water

Greg is testing the effect fertilizer has on pumpkin growth. His experiment requires 20 pumpkins. 10 pumpkins were given the 10 mL of water and 10 mL of fertilizer. What is the independent variable in this experiment?

water

Pumpkin growth

fertilizer

The amount of fertilizer

Greg is testing the effect fertilizer has on pumpkin growth. His experiment requires 20 pumpkins. 10 pumpkins were given the 10 mL of water and 10 mL of fertilizer. If Greg’s results are valid then what should other students be able to do?

Perform the same experiment and get different results.

Repeat the experiment with a different fertilizer.

Repeat the same experiment with the same results.

Perform the same experiment with squash.

## Which of the following is quantitative data?

10 pumpkins grew larger

Pumpkin 10 and 11 are orange

Pumpkins are orange

Pumpkins have seeds.

Carbohydrates

Lipids

Nucleic acids

Proteins

Carbohydrates

Lipids

Nucleic acids

Proteins

Carbohydrates

Lipids

Nucleic acids

Proteins

Carbohydrates

Lipids

Nucleic acids

Proteins

Carbohydrates

Lipids

Nucleic acids

Enzymes

temperature

Concentration

pH

color

Carbon

Phosphorus

Nitrogen

Helium

## Which of the following would happen if the active site changed shape?

Protein/

enzyme

The protein (enzyme) will work faster

The protein (enzyme) will work slower or not at all.

The nucleic acid will work faster

The nucleic acid will work slower or not at all

Prokaryotic

Eukaryotic

Bacteria

Viral

Structure 3

Structure 6

Structure 7

Structure 5

Structure 3

Structure 1

Structure 7

Structure 5

Structure 3

Structure 1

Structure 7

Structure 5

Structure 3

Structure 1

Structure 7

Structure 5