A substance has a half-life of 100,000 years and an initial mass of 1,000 grams. how many years will pass before only 250 grams of the substances parent material is left?

How has the human population affected natural resources

Which of Earth's spheres includes the oceans, groundwater, lakes, and glaciers. A) Geosphere B) Hydrosphere C) Biosphere D) Atmosphere

True or false Bacteria, fungi, and other organisms that break down waste are called consumers.

What is the dependent variable? how sunlight with. the color of the light er hts. the intensity of the light e and the height of the plant of asures

How do you describe mitosis?

A common element among all the river valley civilizations was: irrigation systems that moved water to crops and settlements developed plumbing systems developed written materials the worship of leaders as God's

A person's skin cells and eye cells make different types of proteins to perform their functions. What is the source of the instructions from which all of the proteins are made? (A) Genes (B) Mitochondria (C) Ribosomes (D) Gametes

Small masses of neuron cell bodies located outside the cns are called?

As hawkeye and the men neared the huron encampment, what signal did they agree to give in order to warn one another?

An organisms ability to maintain its proer condition