When was Antarctica last ice free?
When was Antarctica last ice free? about 34 million years ago Why is Antarctica shrinking in size? Floating ice and land ice Ice enters the sheet through precipitation as snow. The general trend shows...
Natural sciences
What causes the circulatory system to fail?
What causes the circulatory system to fail? Circulatory failure happens for three main reasons: The heart may not pump enough or strong enough (heart failure). Heart attacks and valve problems are common causes of...
When you burned copper the product copper oxide appeared on the wire Besides copper the other reactant is explain how you know it must be oxygen Where did the oxygen come from?
When you burned copper the product copper oxide appeared on the wire Besides copper the other reactant is explain how you know it must be oxygen Where did the oxygen come from? Copper oxide...
What elements dont react with each other?
What elements dont react with each other? Noble Gases are colorless gases that are extremely un-reactive. Because they do not readily combine with other elements to form compounds, the noble gases are called inert....
Why is the electron transport chain aerobic?
Why is the electron transport chain aerobic? The last step of cellular respiration is the electron transport chain. This is sometimes abbreviated as ETC. The ETC requires oxygen, which means that it is an...
What is being reduced in NaCl?
What is being reduced in NaCl? In the reaction between sodium and chlorine to yield sodium chloride, sodium is oxidized (its oxidation number increases from 0 in Na to +1 in NaCl) and chlorine...
What solid has same density as water?
What solid has same density as water? Since bowling balls are constructed with the same diameter no matter what weight, the only thing that changes is density. A 12 pound ball is about the...
Why does heat make storms?
Why does heat make storms? On a hot summer day the surface of the Earth is heated by the sun. The Earth’s surface heats the air just above the surface through the process of...
What is meant by electromagnetic energy?
What is meant by electromagnetic energy? n. Energy having both the form of electromagnetic waves and the form of a stream of photons and traveling at the speed of light in a vacuum. The...
Why are anthers important to a flower?
Why are anthers important to a flower? Purpose. Anthers hold the pollen that contain the sperm necessary for reproduction. Without the anthers producing the sperm and the pollen, the flower cannot reproduce. Should you...