Biology Leah Melvin

When writing a conclusion, what should you always refer back to?

• procedure

• hypothesis

• your textbook

• the materials list

Mel and Carl conducted an experiment to verify their hypothesis that male eggs of the American alligator only hatch at

high temperatures. They conducted an experiment and their results were tabulated in the data table. Mel and Carl

concluded very high temperatures killed unhatched alligators. What comment(s) would you make to Mel and Carl

regarding their conclusions?

• Their conclusion is correct. Nothing should be added or deleted.

• They should reject their hypothesis. More males hatch at low temperatures, and more females hatch at high

  temperatures.

• They should accept their hypothesis, and also note that more eggs fail to hatch at high temperatures.

• They did not sample very many eggs, and no pattern is apparent in the data.

Tags

NGSS.HS-LS2-2

Leah, LaRenda, and Gabi decide to test what factors influence water absorption by an egg. They remove the shell from 3

eggs by dissolving them in vinegar. They create three different water solutions. One is pure, 100% distilled water, a

second is 50% water/50% corn syrup, and the third is 100% corn syrup. The mass of each egg is measured before they are

put into a single solution for 24 hours. The mass of the eggs is then measured, and the data recorded:

In this experiment, the independent variable they are testing is:

• change in the mass of the eggs.

• the ending mass of the eggs

• the amount of time they were in the solution

• the type of solution the egg is place in

Tags

NGSS.MS-LS2-1

Leah, LaRenda, and Gabi decide to test what factors influence water absorption by an egg. They remove the shell from 3

eggs by dissolving them in vinegar. They create three different water solutions. One is pure, 100% distilled water, a

second is 50% water/50% corn syrup, and the third is 100% corn syrup. The mass of each egg is measured before they are

put into a single solution for 24 hours. The mass of the eggs is then measured, and the data recorded

This group also recorded a dependent variable, which is represented by:

• the change in mass of the eggs

• the ending mass of the eggs

• the amount of time they were in the solution

• the type of solution the egg is placed in

Tags

NGSS.MS-LS2-1

Leah, LaRenda, and Gabi decide to test what factors influence water absorption by an egg. They remove the shell from 3

eggs by dissolving them in vinegar. They create three different water solutions. One is pure, 100% distilled water, a

second is 50% water/50% corn syrup, and the third is 100% corn syrup. The mass of each egg is measured before they are

put into a single solution for 24 hours. The mass of the eggs is then measured, and the data recorded

Based on the data this group gathered, the most appropriate hypothesis would be:

• “If an egg is placed in corn syrup, then it will gain mass.”

• “If an egg is placed in vinegar overnight, then its shell will dissolve.”

• “If three eggs are each placed in three different solutions, then the egg in distilled water will lose mass.”

• “If an egg is placed in a pure water solution, then the egg will gain mass.”

Tags

NGSS.MS-LS2-1

When designing an experiment, scientists will test a relationship between a “cause” and an “effect.” The “effect,” also represented by what the scientist measures and records, is known as the

• dependent variable

• constant

• independent variable

• control group

Jane and David have decided to do an experiment testing how sunlight affects plant growth. The students choose the

same type of plants, soil, pots and amount of water they give the plants. They also make sure each plant is put in their

designated area for the same amount of time each day. One plant is placed outside; one in front of a window that only

gets light for 1/2 the day, and one in a closet. The students collect data every day for two weeks. Their results show

that the plant outside grew the most and the plant in the closet had the least amount of growth.

What are the constant variables that Jane and David used in their experiment?

• type of environment

• the amount of light

• type of soil

• the amount of light and type of environment

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

The most important element necessary for life that makes up EVERY macromolecule is

• Hydrogen

• Nitrogen

• Carbon

• Oxygen

Which macromolecule is the most diverse (has the most purposes in the cell)?

• lipids

• proteins

• carbohydrates

• All of these

Your body prefers to consume ______ for energy, but stores energy as _______ because it has the most energy per

gram.

• protein, fat

• carbohydrates, nucleic acids

• carbohydrates, lipids

• lipids, carbohydrates