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LenKa [72]
3 years ago
9

Louisa put a bowl of water and a bowl of sand in the sun. She put a thermometer in each bowl. Then she recorded the temperature

at the start and after 30 minutes. After 30 minutes, the sand had heated more than the water.
Louisa’s experiment proved that

A. Sunlight does pass through water.
B. Sunlight heats liquids more than solids.
C. Different materials heat up at different rates.
D. Different materials absorb the same amount of heat.
Biology
1 answer:
iren [92.7K]3 years ago
5 0
C that's puld be your answer
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4. Which of the following elements does not want to have eight valence electrons? a. magnesium c. hydrogen b. oxygen d. nitrogen
Cloud [144]

Answer:

Hydrogen.

Explanation:

Hydrogen is the simplest chemical element that exists. The symbol for the chemical element Hydrogen is "H" and it is a colourless, tasteless, odorless, and highly flammable gas.

Hydrogen is a chemical element found in group (1) of the periodic table and as such it has one (1) electrons in its outermost shell. Therefore, Hydrogen has an atomic number of one (1) and a single valence electrons because it has only one proton and one electron in its nucleus.

Based on the octet rule which states that atoms of chemical elements gain, lose or share electrons so as to have eight (8) electrons in their valence shell. Therefore, atoms of chemical elements bond in order to attain the electronic configuration of a noble gas i.e a full valence shell which comprises of eight (8) electrons.

However, the chemical element "Hydrogen" is an exception to the octet rule because it is only able to hold a maximum of two (2) valence electrons in its outermost shell to become full.

<em>Hence, Hydrogen is an element which does not want to have eight valence electrons. </em>

7 0
3 years ago
Which activity is the largest source of U.S. greenhouse gases?
Vinil7 [7]

Answer:

C. electricity generation

Explanation:

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2 years ago
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IN GENERAL, AN 8-YEAR-OLD BOY, WHICH TYPE OF PLANT IS TALLER THAN HIM?
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Answer:

Trees

Explanation:

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4 years ago
In which cell structure are ribosomes produced
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the nucleolus

Explanation:

the internet

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A baby is assessed at one minute after birth using the Apgar scale. Three of the five vital signs are good, but the baby is weak
timama [110]

Answer: The two vital signs the medical team is concerned about are:

1. MUSCLE TONE

2. REFLEX IRRITABILITY

Explanation:

What does APGAR stand for, and what does it measure?

When the scoring system was put into common use, medical professionals created an acronym using Apgar’s last name, so that each criterion included in the assessment would be easier to remember. The five criteria assessed in the Apgar score are:

A – Appearance (skin color)

This is an evaluation of the baby’s skin color. The medical team measures if the baby blue or pale all over, blue at the extremities, or pink all over.

P – Pulse (heart rate)

During this evaluation, the medical team measures if the baby’s heart rate is absent, slow (<100 beats per minute (bpm), or fast (>100 bpm).

G – Grimace (reflex irritability/response)

During this evaluation, the medical team asks if the baby lacks a response to stimulation, responds with a grimace, or responds by crying and pulling away.

A – Activity (muscle tone)

During this evaluation, the medical team asks if the baby is limp, if the baby has some flexion (joint movement), or if the baby shows active motion.

R – Respiration (breathing ability)

During this step, the medical team asks if the baby is failing to breathe, if the baby has a weak cry and slow breathing, or if the baby is breathing well and crying normally.

8 0
3 years ago
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