Scientists can use many strategies during investigations, including heldwork, surveys,
models, and experiments. Which of these phrases best describes an experiment?
A mathematical analysis of data
B. observation of animals in their natural world
Ci collection of data from an uncontrolled environment for comparative purposes
D. procedure with controlled conditions and test and outcome variables

Answer:

It means the coral will turn white and corals may recover (depending on the species) by soaking up ocean surface heat.

Answer: 11 g

Explanation:

Zn + 2HCl    →   ZnCl₂ + H₂

Number of moles of Zn:

Number of moles = 5 g / 65.38 g/mol

Number of moles = 0.08 mol

Number of moles of HCl :  

Number of moles = 50 g / 36.5 g/mol

Number of moles = 1.4 mol

Compare the moles of both reactant with zinc chloride:

             Zn             :           ZnCl₂

              1             :             1

             0.08       :        0.08

           HCl          :         ZnCl₂

             2            :           1

            1.4          :         1/2×1.4 =0.7 mol

The number of moles of zinc chloride produced by Zn are less so it will limit reactants.

Mass of zinc chloride:

Mass = 0.08 mol × 136.3 g/mol

Mass = 11 g

4. Obsidian - rapid cooling when lava flows into water.

Granite - very slow cooling such as what occurs when magma is trapped beneath Earth's surface.

Basalt - cooling when lava flows over land

5. They are slightly simplistic and rock formation is not limited to only these methods.

6. They give a general overview of how a certain type of rock may be formed and how to identify them from a basic level based on their location.

Answer:

a. Hh, hh

b. hh

c. 50%

d. 50%

Answer:

UV Rays

Here are some points you can add

•used to sterilise equipment from microbacterial organisms

•used to create fluorescence mechanism

•used to purify air

•used to tenderize meat

•can be implemented in medical and dental practices

•water purification

•stimulates vitamin d production

Answer:

Sea level rise is caused by several different processes, including melting ice. But one big contributor to sea level rise is increasing global temperatures, which heat seas and cause something called thermal expansion of water. Thermal expansion happens when water gets warmer, which causes the volume of the water to increase. About half of the measured global sea level rise on Earth is from warming waters and thermal expansion.

Explanation:

I hope this helps

Answer:

A glass pane / A.

Explanation:

Examples of insulators include plastics, Styrofoam, paper, rubber, glass and dry air. The division of materials into the categories of conductors and insulators is a somewhat artificial division.

Answer:

the answer is A

Explanation: