FTCE Science 3

Question 1

Which best explains why water molecules are attracted to each other?

Accepted Answer

Hydrogen bonding due to polar O-H bonds

Answer

Water molecules form hydrogen bonds because oxygen is highly electronegative, creating partial charges that attract neighboring water molecules.

Question 2

A student notices that the Moon appears to change shape over a month. What actually causes the Moon's phases?

Accepted Answer

Different portions of the Moon's sunlit half visible from Earth

Answer

Moon phases result from the changing angle between the Sun, Moon, and Earth, which determines how much of the Moon's illuminated side we see.

Question 3

In a food web, which organism occupies the role of a primary producer?

Accepted Answer

Grass

Answer

Primary producers like grass convert solar energy into chemical energy through photosynthesis, forming the base of the food web.

Question 4

A teacher asks students to identify a controlled variable in an experiment testing how light intensity affects plant growth. Which would be a controlled variable?

Accepted Answer

The amount of water given to each plant

Answer

Controlled variables are factors kept constant so they don't affect the results; water amount must be equal for all plants in this experiment.

Question 5

Which process moves water from soil into plant roots against a concentration gradient?

Accepted Answer

Osmosis

Answer

Osmosis moves water from an area of high water concentration (wet soil) into root cells with lower water concentration through a semi-permeable membrane.

FTCE Practice Test

FTCE Practice Test

FTCE Science 3