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 Climate Change: Crash Course Kids #41.2
작성자
 이** (jean)
글내용

 

DESCRIPTION: 

In this episode of Crash Course Kids, Sabrina shows us the effects that climate 

change can have and how one small change in an ecosystem can throw everything off. 

 

TRASCRIPT: 

Hey, what's the difference between weather and climate? You can't weather 

a tree but you can climate but you already know the difference between weather 

and climate and if it slipped your mind the definitions are right there you know that

the weather can change quickly but climate can also change just more slowly and

if you're good at putting two and two together and I know you are you probably 

already noticed that we use some of the same words when we talk about climate

and environment words like temperature and rainfall coincidence I think not but 

science demands evidence my friends and while we've already seen that living

things can change when environments change we need to ask how might a change

in climate affect an ecosystem first let's talk climates through little nice travels 

we found out that Yuma Arizona had a hot and sunny climate we decided this 

after finding out that although it rained once or twice during my long state most of

the days were hot and dry now the plants and animals that live in Yuma's hot dry

sunny climate have adaptations that help them live in that desert environment if 

we took a hike around Yuma we might see a cactus and if we took a closer and

careful look at the cactus we'd see that its outside is kind of waxy and tough this

adaptation helps the cactus save water by keeping the water from evaporating into

the dry air now see something happened to you miss climate say over the course

of about 20 years there were even hotter days and less rainfall than before when 

weather patterns change over a long period of time we call it climate change what

the cactus has adaptations be enough then let's find out let's look at some

organisms that are part of a desert ecosystem we have our friend the cactus

a kangaroo rat a rattlesnake and a desert fox we can use a handy dandy food 

chain model to see how energy flows between living things in this ecosystem it

would probably look something like this the cactus makes energy by 

photosynthesis and the energy goes from the cactus to the rat then to the 

snake and then to the Fox now although the cactus has adaptations that help

it store and save water it still needs rain if it doesn't get enough in a drier

climate it's not going to have anything to store and it's not going to be able

to survive and you know what happens when we take out the bottom of the 

food chain it's like taking the wrong block and Jenga we throw the rest of the

ecosystem off-balance but that's not the only problem less rain and hotter 

temperatures mean less water to drink for all of the animals and although they

have adaptations to like scales to help them retain water that won't be enough 

to let them fit into a much hotter and drier climates and globally the climate is

changing scientists who study climate change think that it's caused in part by 

changes to the Earth's atmosphere an increase in gases like carbon dioxide is 

trapping more heat close to the earth acting like a blanket and making the earth

warmer but scientists are hard at work trying to find solutions to climate change

for example they're looking at ways to keep too much carbon dioxide from

entering the atmosphere so all living things that make up the Earth's biosphere

have adaptations characteristics that help them fit into their environment long-term

changes in the Earth's weather patterns called climate change may have effects 

on the living things that make up ecosystems now if only I could change that joke

I told at the beginning of this video. 

 

QUESTIONS: 

1. How does climate change? 

    What happens to environments and ecosystems when it does? 

2. How do you feel about climate change? 

3. What do you think the world’s climate will be like 50 years from now?

작성일자
2021-01-26 오후 1:34:29
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