Answer:
What are the following substances?
Explanation:
I could only find 7!
- independent variable
- dependent variable
- control group
- experimental group
- constant
- observation
- inference
Answer:
A metal atom loses electrons and becomes a positive ion and a non-metal atom gains electrons and becomes a negative ion.
Answer:
A oxygen
Explanation:
For plant growth nitrogen, potassium and phosphorous are the three main elements needed. oxygen is expelled from plants. Plants doesn't need oxygen
