What balloons allowed scientists to study what for the first time

Pollinators and flowers have a close relationship. What type of relationship is this an example of?

What is the maximum number of electrons in the 1s orbital of an atom? a. 1 b. 2 c. 3 d. 4 e. 5

What happened during the Pleistocene to cause global cooling? A) fossil fuel consumption B) low solar activity C) a shift in earth's orbit D) breakup of Pangaea

How does sediment form? A weathering breaks down rocks and other material. B chemical changes cause sediment to cement together. C loose material is compacted by pressure. D molten rock cools below the earth surface

A weather map shows a line of red semicircles. What does this mean?

What is the meaning of the word "thermal" in this sentence? all boys coming on the school camping trip need to bring a pair of long thermal underwear because it is going to be very cold this weekend.

If an animal had 44 chromosomes in its sex cells, how many chromosomes total will they have?

Which system regulates and controls growth, development, metabolism, and reproduction? 1. endocrine system 2. lymphatic system 3. integumentary system 4. skeletal system

In photosynthesis what do the chloroplasts convert the energy of sunlight into?

State what scientists might do to successfully combat bacteria that are resistant to vancomycin