Some benefits are that DDT helps us grow crops and keeps pests off our crops.
But DDT is harmful to the environment. If it gets into the water ways then if can harm fish and animals that eat the fish such as birds.
Answer:
put a test tube over the opening, remove it and quickly put a lit splint near the mout or in the tube. if you hear a squeaky pop it is hydrogen.
Explanation:
hydrogen ignites in air.
It is a Physical property because like water it changes into a ice cube but it can be melted into water or be turned back into an ice cube.
Hope this helps
Answer- 1 mole
Succession would help over time because new things will appear after
