Environmental Science Pre-Test/Final

Hydrangea flowers come in a range of colors, from shades of blues, to purples, to pinks, and reds. Changing the soil pH affects the color of the hydrangea flowers.

Mrs. Ray likes blue hydrangea flowers best, and wants as many blue hydrangea flowers as possible in her garden. She decides to do an experiment. Mrs. Ray plants 4 hydrangea bushes in acidic soil with a pH of 5, 4 hydrangea bushes in neutral soil with a pH of 7, and 4 more hydrangea bushes in basic soil with a pH of 9. She gives all the bushes the same amount of water, sunlight, soil, and temperature. At the end of the experiment, she determined that the acidic soil was best for producing blue hydrangea flowers.

What type of variable is the pH of the soil?

• Independent

• Dependent

• Control/Constant

• Qualitative

Hydrangea flowers come in a range of colors, from shades of blues, to purples, to pinks, and reds. Changing the soil pH affects the color of the hydrangea flowers.

Mrs. Ray likes blue hydrangea flowers best, and wants as many blue hydrangea flowers as possible in her garden. She decides to do an experiment. Mrs. Ray plants 4 hydrangea bushes in acidic soil with a pH of 5, 4 hydrangea bushes in neutral soil with a pH of 7, and 4 more hydrangea bushes in basic soil with a pH of 9. She gives all the bushes the same amount of water, sunlight, soil, and temperature. At the end of the experiment, she determined that the acidic soil was best for producing blue hydrangea flowers.

What type of variable is the hydrangea flower color?

• Independent

• Dependent

• Control/Constant

• Qualitative

Hydrangea flowers come in a range of colors, from shades of blues, to purples, to pinks, and reds. Changing the soil pH affects the color of the hydrangea flowers.

Mrs. Ray likes blue hydrangea flowers best, and wants as many blue hydrangea flowers as possible in her garden. She decides to do an experiment. Mrs. Ray plants 4 hydrangea bushes in acidic soil with a pH of 5, 4 hydrangea bushes in neutral soil with a pH of 7, and 4 more hydrangea bushes in basic soil with a pH of 9. She gives all the bushes the same amount of water, sunlight, soil, and temperature. At the end of the experiment, she determined that the acidic soil was best for producing blue hydrangea flowers.

What type of variable is the amount of sunlight?

• Independent

• Dependent

• Control/Constant

• Qualitative

Analyze the graph. Which statement about the graph is true?

• There is zero correlation between the amount of spring rainfall and the number of frogs in the pond.

• The amount of spring rainfall is the independent variable, and the number of frogs in the pond is the dependent variable.

• As the amount of rainfall increases, the number of frogs decreases.

• The number of frogs in the pond is the independent variable, and the amount of spring rainfall is the dependent variable.

Analyze the graph. Which statement about the graph is NOT true?

• The amount of time bacteria were exposed to UV is the independent variable, and the number of mutant bacteria cells is the dependent variable.

• E. coli, S. aureus, and C. sporogenes are control variables.

• There is a positive correlation for all 3 types of bacteria.

• UV exposure had the greatest effect on E. coli.

Analyze the graph. Which statement about the graph is true?

• Treatment 1 was more effective than treatment 2 at reducing the number of seizures.

• Number of seizures is the independent variable, and days after birth is the dependent variable.

• For all mice except the healthy mouse, overall there is a negative correlation between days after birth and number of seizures.

• The sick mouse always had the highest number of seizures.

Which of the following is NOT an element of life?

• Carbon (C)

• Nitrogen (N)

• Oxygen (O)

• Hydrogen (H)

• Potassium (K)

Which of the following is NOT a macromolecule of life?

• Nucleus

• Nucleic Acid

• Protein

• Lipid

• Carbohydrate

Which element is found in all organic molecules?

• Hydrogen (H)

• Carbon (C)

• Oxygen (O)

• Nitrogen (N)

Look at the diagram. Which statement about glucose is NOT true?

• Glucose is made of 3 elements.

• Glucose is made of 24 atoms.

• Glucose is a molecule, but NOT a compound.

• Glucose is an organic molecule.