Three variables can be used .
1. Sun 2. Moon 3. Earth
These are suggestions that lizzie can control:
1.<span> Discover how long the Earth takes to orbit the Sun
2. how many hours it takes the Earth to spin around once on its own axis, 3. how long the Moon takes to orbit the Earth</span>
Answer:
Hope it helps u
Explanation:
They do not get infected with tetanus because they have already been vaccinated which means there are white blood cells and antibodies ready to fight tetanus.
Their immune system is safe because the antibodies won’t let them feel sick.
Answer:
6
Explanation:
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