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MrRissso [65]
3 years ago
15

The chemical name for sand is silicon dioxide. The two elements found in a sample of this sand are _____ and _____.

Biology
2 answers:
liubo4ka [24]3 years ago
5 0
Silicon and oxygen as the compound name is silicon dioxide
Maksim231197 [3]3 years ago
4 0

Answer:

Silicon and oxygen

Explanation:

The chemical formula for silicon dioxide is SiO2. Hence, silicon dioxide has one atom of silicon (Si) and two atoms of oxygen (O). Analysis of sand rich in silicon dioxide would have two elements namely, "silicon (Si) and oxygen (O)".

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If you could repeat the lab and make it better, what would you do differently and why?
lions [1.4K]

Answer:

The advise I will offer the next scientist about how the laboratorycan beimproved include the following 

Calibration of instruments: Instruments which are used in the laboratory should be calibrated so as to reduce errors and inaccuracy during experiments.

Proper labeling of Samples : This helps to give the scientists an idea of where to find samples and to prevent making mistakes in picking the wrong one. This helps to save time and resources in the lab.

Adequate cleaning and waste disposal: Cleaning of the lab and disposal of the wastes helps to eliminate contamination of samples.

Explanation:

4 0
2 years ago
What happens to the carbon dioxide (CO2) levels of a plant when it does or does not have light?
zubka84 [21]

Explanation:

Carbon dioxide is needed for photosynthesis, but oxygen is needed for cellular respiration. Assuming there is still oxygen then the plants will produce carbon dioxide and some of it will be reabsorbed by photosynthesis during daylight. However, ultimately there wouldn’t be enough carbon dioxide for the plants to grow and they will start to die. Some plants have evolved a C4C4 photosynthesis pathway so they only require a small amount of CO2CO2 to survive, however they do still require more than zero CO2CO2.

So basically you killed off all the plants and all the other non-microbial life died of starvation shortly afterward.

Hope it helps...!! Please mark as brainliest

8 0
2 years ago
Which of the following statements is the most likely explanation for plant withering due to leaky membranes in cold temperatures
podryga [215]

Answer:

C. H+ ions do not accumulate inside the thylakoid, so ATP synthase makes too little ATP.

Explanation:

Plant withering refers to the virtual death of plant cells due to lack of food. During the light-dependent reactions of photosynthesis, ATP needed for the synthesis of sugar (food) is created in the thylakoid membrane of the CHLOROPLAST of plant cells.

In the light-dependent reaction, hydrogen ions (H+) builds up/accumulate in the thylakoid lumen to create an electrochemical or proton gradient i.e. a difference in the concentration of H+ ions across the membrane. The hydrogen ions passes through a protein complex called ATP synthase, which forms ATP from ADP (by adding phosphate group), from the energy generated by the electrochemical gradient formed as a result of hydrogen in (H+) build up.

Hence, a plant that possess leaky membrane due to the cold temperature will likely wither because H+ ions are not able to accumulate inside the thylakoid causing a proton gradient, so ATP synthase makes too little ATP.

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3 years ago
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SpyIntel [72]

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7 0
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