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Mama L [17]
3 years ago
14

Determine which type of property each statement describes by typing “physical” or “chemical” in the blank

Biology
2 answers:
Semmy [17]3 years ago
7 0

Answer:1. physical property.  

2. chemical property.

3. chemical property.

4. physical property.

Explanation:

Physical property is defined as the property which can be measured and whose value describes the state of physical system. For Example: State, density etc.

Chemical property is defined as the property of a substance which is observed during a reaction where the chemical composition identity of the substance gets changed.

1. Hydrogen is a colorless, tasteless, and odorless gas : physical property as there is no change in chemical composition

2. Hydrogen is very combustible in the presence of oxygen :chemical property as there is a change in chemical composition

3. Hydrogen is very reactive with most elements :chemical property as there is a change in chemical composition

4. Hydrogen is the least dense of all elements : physical property as there is no change in chemical composition

lilavasa [31]3 years ago
5 0

Answer:

physical

chemical

chemical

physical

Explanation:

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Which structure is at work when the body deals with reflex actions?
Ne4ueva [31]

Answer:

spinal cord

Explanation:

Reflex actions are the involuntary action of the body in response to a signal or stimulus. The reflex action of body is controlled by spinal cord.

Reflex arc acts as a neural pathways that transmit impulse to the brain via spinal cord. Sensory neurons pass through synapse in the spinal cord which activate spinal motor neuron to act immediately without any delay.

Immediate taking off hand from hot oven is an example of reflex action, which is regulated by spinal cord.  

Hence, the correct option is spinal cord.

 

5 0
3 years ago
Read 2 more answers
Select the correct answer from each drop-down menu.
4vir4ik [10]

Explanation:

Amylase is a digestive enzyme secreted and is responsible for breaking down <u>starch.</u>

Digestion describes the intake, chemical and physical breakdown, absorption of nutrients and excretion of food.  Alpha amylase, an enzyme produced in the pancreas, is found in human saliva; it catalyzes the breakdown of starch into glucose

Further Explanation:

Food is chemically and mechanically broken down into into smaller particles. This begins in the mouth, where food is mechanically crushed by the teeth, and mixed with saliva to allow water based enzymes like lingual lipase and amylase to work;- it's then transported to the stomach via the esophagus.

Alpha amylase, an enzyme produced in the pancreas, is also found in human saliva; it catalyzes the hydrolysis, or breakdown of starch into glucose in the stomach as gastric amylase. Amylase acts on polysaccharides bonds at random points along the chain by splitting the α 1-4 glycosidic bonds.

Learn more about digestion at brainly.com/question/12328001

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7 0
3 years ago
Three things are necessary for humans to keep
Novay_Z [31]

The head should be positioned in the upper  of the body.

The weight of the center body should be over  the pelvis.

The legs and knees should be stable enough to support that body's weight

Explanation:

For humans to keep a balance while walking, their body must be properly positioned in the right manner.

  • The head must be fixed and positioned straight on the upper body. It should not at any point be unbalanced by being projected too forward or backward or to the side.
  • The weight of the center body should be over the pelvis. The alignment gives the proper positioning of the center of gravity of the human body.
  • The pelvis should carry and spread the weight of the body to the body parts that attaches to it.
  • The legs and knees should be straight and stable to support the weight of the body.
  • If they are not strong enough the body will wobble and not be balanced.

learn more:

Body weight in individuals brainly.com/question/6957100

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7 0
3 years ago
What is the antomoy of a flower?
LuckyWell [14K]
The Male Reproductive Organs: Stamens are the male reproductive parts of flowers<span>. A stamen consists of an anther and a filament. The pollen consists of the male reproductive cells; they fertilize ovules. 
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7 0
3 years ago
Explain the relationship between the c-h bonds and the caloric value. (Does one control the other?)
velikii [3]
The caloric value of food refers to the amount of energy that is produced as a result of complete combustion of that food under normal conditions.
Foods have energy which are stored in the chemical bonds that hold their molecules together. This stored energy is released when the chemical bonds are broken during metabolic processes such as respiration. The amount of energy in different foods differ and  the quantity of energy in the chemical bonds that hold the food molecules together will determine the amount of energy that will be obtained from the food. 
 In most food molecules, the chemical bond that hold the food molecules together is C-H bond. C-H bond is a strong covalent bond which give stability to the food molecule. The higher the chemical energy that is stored in this bond, the higher the caloric value of food. Thus, the calorific value of food is depended on the quantity of energy that reside in the C-H bond.

5 0
3 years ago
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