Greg wants to build a tree house. he wants the house to last for a long time and not to be broken down by rain, snow, and wind. which of the following would greg to choose a durable building material

C

Explanation: Build several models of his tree house out of different materials, and see which model holds up best to wind, water, and ice.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

the pseudoscience are like beliefs, theories, or like practices that are considered scientific