Grade 6 · Science
Cells, genetics, body systems, and Earth science. Written in American English for students, parents, and teachers in the United States.
Open a card to see the answer. These are original practice items for US elementary students — not a state test copy.
Answer: nucleus
The nucleus stores genetic material.
Answer: controls what enters and leaves the cell
It is a selective barrier.
Answer: chloroplasts
Chloroplasts help with photosynthesis.
Answer: cell wall
Animals have membranes, not rigid walls.
Answer: powerhouses of the cell
They release energy from food.
Answer: one cell
Bacteria are unicellular.
Answer: cytoplasm
Organelles sit in the cytoplasm.
Answer: a cell
Cells build tissues, then organs.
Answer: a testable prediction
If…then… is a common form.
Answer: one independent variable at a time
Keep other conditions the same.
Answer: what you measure
It depends on the change you made.
Answer: does not get the treatment being tested
It is the comparison group.
Answer: recorded honestly, even if it surprises you
Science values evidence over wishes.
Answer: whether the data support the hypothesis
Tie results back to the question.
Answer: check if results are consistent
Replication builds confidence.
Answer: How does fertilizer amount affect bean height?
It can be measured.
Pick the next article in this topic — that is how a magazine issue is meant to be used.
