1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
katovenus [111]
2 years ago
5

Really need help on this asap giving out 15 points :)

Biology
2 answers:
OLEGan [10]2 years ago
4 0

Explanation:

1 chemical reaction endothermic

2 physical change. exothermic

3 chemical reaction endothermic

creativ13 [48]2 years ago
4 0

<u>Answer:</u>

1. Chemical reaction   |    Endothermic

2. Physical change     |    Exothermic

3. Chemical reaction  |     Endothermic

<u>Explanation:</u>

• Chemical reaction or Physical change?

A chemical reaction occurs when one or more substances converted into one or more different substances; they are usually irreversible.

A physical change occurs when the state of matter, or any other physical property, of a substance changes; they are usually reversible.

• Endothermic or Exothermic?

An endothermic reaction or change is one in which the system takes in thermal energy.

An exothermic change is where thermal energy is given out by the system.

You might be interested in
What type of sign warns you to watch right and left for cross traffic?
sweet-ann [11.9K]
A warning sign. cross road ahead. Slow down look carefully in all directions 
6 0
3 years ago
क्षेत्रभेटी नियोजनात वाहतुक मागव वाहतुक मार्ग साधनांचा विचार करने महत्वाचे का असते<br>​
Schach [20]
Jdhcnejkckelcjfhdiwkxkxnjscj
8 0
2 years ago
Explain how soil is important to animal life
Cloud [144]

Answer:

plants!

Explanation:

the soil helps the plants grow which in result animals eat to get health mostly herbivores they eat plants

5 0
3 years ago
Read 2 more answers
When traits are inherited separately it is called?​
harkovskaia [24]
Cross over? i have no idea lol
6 0
2 years ago
The students concluded that pea plants grew better in compost than did melon plants. Which of the following best addresses the v
musickatia [10]

Answer:

c. The conclusion is invalid because other variables in the experiment affected the results.

Explanation:

Consider the complete problem:

A group of students designed an experiment to determine the effect of compost on the germination and growth of plants.

The students set up experimental plots by mixing different ratios of soil and compost. They planted 20 pea and 20 melon

seeds in each plot and watered each plot regularly. The students recorded the number of seeds that germinated, and as the

plants grew they recorded the plant length, number and size of leaves, and general health observations.

The following observations were recorded.

 In all treatments, more pea seeds germinated than melon seeds

 There was a week of rainy weather at 3 weeks

 Melon plants developed a fungal growth at four weeks

 Melon plants grew longer than pea plants, but many melon leaves showed signs of yellowing as the weeks passed

The students concluded that pea plants grew better in compost than did melon plants. Which of the following best

addresses the validity of the conclusion made by the students?

a. The conclusion is valid because the independent and dependent variables in the experiment were controlled.

b. The conclusion is valid because the experimental design included a large sample size.

c. The conclusion is invalid because other variables in the experiment affected the results.

d. The conclusion is invalid because the units of measurement were not given in the experimental design.

<em>In order for the conclusion to be valid, all the independent variables should have been controlled. In this case, the independent variables such as the amount of water received by the plants, nutrient requirement of the plants, etc. were not controlled leading to fungal attack on the melon plant.</em>

<em>Hence, the conclusion is invalid because other variables that ought to have been controlled affected the experimental outcome.</em>

<em>The correct option is c.</em>

4 0
3 years ago
Other questions:
  • What is the family of the animal that is land-dwelling and uses scent glands for defense?
    9·2 answers
  • Arrange the steps in order to explain how a tornado form
    9·2 answers
  • How are fungi more like an animal? A.They have a cell wall. B.They are heterotrophs that absorb their food. C.They produce seeds
    10·2 answers
  • The nurse is providing discharge instructions to the parents of a child who has undergone surgical correction of hypospadias. wh
    5·1 answer
  • Which of the following grouping below is NOT a group of organ systems?.
    13·2 answers
  • How people tend to group discrete stimuli together into a meaningful whole are collectively known as the _____?
    9·1 answer
  • In negative control of transcription by the lac operon, how does the presence of an inducer affect transcription?
    11·1 answer
  • 3.<br> Which of the following does NOT occur during cytokinesis of animal cells?
    14·1 answer
  • The immune system has both specific and nonspecific defenses against viral infections. Which statement describes a nonspecific r
    14·2 answers
  • Viruses have many things in common with living organisms, but they are NOT actually considered living. Why?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!