Answer the following question given this paragraph: The extent of Arctic sea ice in summer has been decreasing rapidly. The ice pictured below is the sea ice minimum in 2011 ( Figure below ). The yellow line is the median minimum ice extent for 19792000. Q: What trend is occurring involving the extent of arctic sea ice in summer? Choices: - slow decrease - water decrease - Ice growth - rapid decrease A:
rapid decrease
Answer the following question given this paragraph: Great volcanic explosions and glowing red rivers of lava are fascinating. All igneous rock comes from magma or lava. Remember that magma is molten rock that is below Earth's surface. Lava is molten rock at Earth's surface. Q: Where does all igneous rock come from? Choices: - the moon - stratosphere - oceans - magma or lava A:
magma or lava
Q: Answer the following question given this paragraph: Plastids are membrane-bound organelles with their own DNA. Examples are chloroplasts and chromoplasts. Chloroplasts contain the green pigment chlorophyll and carry out photosynthesis . Chromoplasts make and store other pigments. They give flower petals their bright colors. Q: What are membrane-bound organelles with their own dna called? Choices: - vacuoles - chromosomes - ribosomes - plastids A:
A: plastids
Question: Answer the following question given this paragraph: As you learned in Chapter 1 "Introduction to Chemistry", the mass number is the sum of the numbers of protons and neutrons present in the nucleus of an atom. The mass number is an integer that is approximately equal to the numerical value of the atomic mass. Although the mass number is unitless, it is assigned units called atomic mass. Q: What number is the sum of the numbers of protons and neutrons present in the nucleus of an atom? Choices: - nuclear number - combined number - mass total - mass number A:
Answer: mass number
*Question*
Answer the following question given this paragraph: Some single-celled organisms, such as algae, live in colonies. A colony is an organized structure composed of many cells, like the Volvox sphere in Figure below . Volvox are algae that live in colonies of hundreds of cells. All of the cells in the colony live and work cooperatively. For example, they can coordinate the movement of their flagella, allowing them to swim together through the water as though they were part of a single organism. Q: What are algae that live in colonies of hundreds of cells called? Choices: - chlorophyta - euglenids - rhodophyta - volvox A:
**Answer**
volvox
Q: Answer the following question given this paragraph: A magnet is an object that attracts certain materials such as iron. All magnets have north and south magnetic poles. The poles are regions where the magnet is strongest. Q: In a magnet, what are the regions called that are the strongest? Choices: - positives - plates - negatives - poles A:
A: poles