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kolezko [41]
3 years ago
8

Can somebody help me with this?

Biology
1 answer:
leonid [27]3 years ago
3 0

Answer:

Elements: H (hydrogen) He (helium) Li (lithium) Be (beryllium) B (boron)

compounds: H2O (water) H2O2 (Hydrogen peroxide) NsHCO3 (baking soda) NaCI (salt)

Element compound or mixture?: 1. Element 2. compound 3. Mixture of elements 4. mixture of compounds 5. mixture of elements and compounds.

Rewrite the sentences:

1. all matter is made up of tiny particles calles atoms and molecules

2. right

3. right

4. compounds are chemically joined together

task 2:

1. i know this is element

2. i know this is compound

3. i know this is mixture

task 3:

In this lesson i have learned that Atoms are in everything and are what makes up most of the stuff on earth. They are tiny molecules that make up me and everything around me. I have also learned that atoms are made up of Elements. Elements are chemical molecules that make up things like the air we breathe. However, when more than one element joins together a compound is formed. Compounds make up more physical things around me such as drinking water and salt for cooking. When many different compounds are joined together a mixture is formed. An example of a mixture can be sand and water.

Explanation:

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zubka84 [21]

Answer: 1

Explanation:

http://www.mayfieldschools.org/Downloads/protein_synthesis_review_worksheet.pdf

6 0
3 years ago
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You are testing whether temperature has an effect on the breaking point of rubber bands. You take one rubber band and put it in
prisoha [69]
Independent variable: Temperature 
Levels: Room temperature
Freezing point 0C
Boiling point 100C

Dependent variable: breaking point of rubber bands measured in certain amount of temperature
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3 years ago
Learning Competencies: 1. Explain how protein is made using information from DNA. 2. Explain how mutation may cause changes in t
olga2289 [7]

Answer:

The correct answer is -

1. protein synthesis or central dogma

2. leads to changes in the structure by changing in the codes which results in a decrease or loss of function.

Explanation:

1, Protein is made from the information coded in DNA base sequences by the two process protein synthesis that is also called central dogma. The two-process involve in this are transcription involves encoding the information present in DNA by mRNA molecule that codes the information in complementary sequence to DNA. which is then moved out of the nucleus and perform the translation with help of tRNA and ribosome to code the amino acid with help of triplet codes present in mRNA. These amino acids chain are called proteins.

2. Mutations can lead to change in the base sequences or deletion of the base which affects the structure of the protein and also leads to changes in an encoded protein or to a decrease or complete loss in its function or expression. Mutation can damage the cell or organism as it affects the gene expression of all cells of organisms.

7 0
3 years ago
The solutions in the two arms of a U-tube are separated by a membrane that is
IgorC [24]

Answer:

See the answer below

Explanation:

Recall that: <em>Water potential = pressure potential + solute potential</em>

Since the system is an open one;

<em>Water potential = solute potential = -iCRT</em>

i = number of particles the molecle will make in water (1)

C = molar concentration

R = Pressure constant = 0.0831 liter bar/mole K

T = temperature in kelvin = 22 + 273 = 295 K

To calculate water potential on side A:

C = 1 M

Water potential = - (1 x 1 x 0.0831 x 295) = -24.51 bars

For side B:

C = 2 M

Water potential = - (1 x 2 x 0.0831 x 295) = -49.03 bars

b.

<em>Since side A has higher water potential than side B, water will flow from side A to side B until equilibrium is established between the two sides. Water always flows from the region of higher water potential to the region of lower water potential.</em>

<em />

6 0
2 years ago
What is the scientific term used for the chemical reaction when a fuel burns? (Hint: your answer should be one word.)
yawa3891 [41]

Answer:

Combustion

Explanation:

Combustion is the chemical reaction that happens when fuel burns.

6 0
2 years ago
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