Question

jackson buries seeds in the soil in three plastic cups to investigate seed growth in different light levels. he places one cup outside so it receives light during the day, one cup in a dark closet with no light, and the last cup under a lamp that shines light on it at all times. he leaves the cups in those places for one week and records the growth at the end of his investigation. choose two statements about this investigation that are true. a the control is the cup placed outside because it will receive a natural amount of sunlight. b it is not a fair test because the amount of soil and the type of seed in each cup is different. c the control is the cup under the lamp because it is receiving more than a normal amount of light. d the control is the cup placed in the closet because it is not receiving the
ormal\ amount of light. e it is a fair test because the only thing different about each cup is the amount of sunlight received.

Explanation:

• For option A: The cup outside gets natural sunlight, so it can be the control (standard for comparison) as it has a natural light amount. This is correct.
• For option B: The problem states Jackson buries seeds in three plastic cups, implying same soil and seed type (no info of variation), so B is wrong.
• For option C: The cup under the lamp has artificial light, not more "normal" light (natural sunlight is normal here), so C is wrong.
• For option D: The closet cup has no light (not normal), but a control should be the standard condition (natural light, i.e., outside cup), so D is wrong.
• For option E: The only variable is light (amount of sunlight: outside has natural, closet has none, lamp has artificial? Wait, no—wait, the setup: one outside (natural light), one closet (no light), one under lamp (constant light). But the key is if only light differs. If soil and seed are same, then it's a fair test (only light variable). Wait, but earlier analysis for A: A says control is outside (natural light, standard). E says it's fair because only light differs. So A and E are correct? Wait, let's recheck:

Wait, the question is to choose two true statements. Let's re-express each:

A: Control is outside (natural sunlight) – correct, as control is the standard condition (natural light exposure).

E: Fair test because only light differs (assuming soil, seed, etc., same) – correct, as a fair test has one variable (light here: outside - natural, closet - no, lamp - constant artificial? Wait, but the problem says "amount of sunlight" – maybe lamp is constant, outside is variable (daytime), but the key is if other factors (soil, seed) are same. The problem says "buries seeds in three plastic cups" – so same soil, same seeds. So only light (amount: outside has natural (varies day), closet has none, lamp has constant) – but the "amount of sunlight" – maybe the lamp is a fixed amount, outside is natural (variable but considered as "normal"), closet is zero. So the only difference is light amount, so E is correct (fair test, one variable).

So A and E are true. Wait, but let's check the options again. Wait, the user's question is to choose two true statements. Let's confirm:

A: Control is outside (natural light, standard) – correct.

E: Fair test because only light differs (since soil, seed, etc., same) – correct.

Other options:

B: Says soil and seed type differ – but problem says "buries seeds in three plastic cups" – implies same soil, same seeds. So B is false.

C: Control is lamp cup – no, lamp is artificial, not normal.

D: Control is closet cup – no, closet has no light, not normal.

So correct two are A and E.

Wait, but maybe I made a mistake earlier. Let's re-express:

A: The control is the cup placed outside because it will receive a natural amount of sunlight. – Correct (control is standard condition, natural light is standard for seed growth in nature).

E: It is a fair test because the only thing different about each cup is the amount of sunlight received. – Correct (assuming soil, seed, water, etc., are same; the problem states "buries seeds in three plastic cups" – so same soil, same seeds, so only light (amount: outside - natural, closet - 0, lamp - constant) differs. So E is correct.

So the two true statements are A and E.

Answer:

A. The control is the cup placed outside because it will receive a natural amount of sunlight, E. It is a fair test because the only thing different about each cup is the amount of sunlight received