International space
station
station
What is the main purpose of the International Space Station?
The main purpose of the International Space Station is to do science research in space and study how people live without gravity.
What is a satellite, and how is it used in everyday communication?
A satellite is an object that orbits Earth or another planet. It is used in everyday communication by sending signals for things like phone calls, TV, GPS, and internet.
What is the Internet, and how do people use it in everyday life?
The Internet is a global network that connects computers and devices so they can share information. People use it every day for things like messaging, watching videos, learning, shopping, and using apps.
What does DNA do inside living things?
DNA is like a set of instructions inside living things that tells cells how to grow, work, and build the body.
What was the Green Revolution, and why was it important for farming?
The Green Revolution was when farming improved and produced more food. It helped reduce hunger in many countries.
Which countries and space agencies work together to operate the International Space Station?
The International Space Station is operated through cooperation between NASA (U.S.), Roscosmos (Russia), the European Space Agency, JAXA (Japan), and the Canadian Space Agency.
What is the difference between geostationary satellites and low Earth orbit satellites?
Geostationary satellites stay in one place above Earth, while low Earth orbit satellites move around it quickly.
What is the difference between the Internet and the World Wide Web?
The Internet is the global network that connects computers and allows data to travel between them. The World Wide Web is a service that runs on the internet and lets people view websites and web pages using a browser.
What is the difference between a gene and a chromosome?
A gene is a small section of DNA that contains instructions for a specific trait, while a chromosome is a long, tightly packed structure that contains many genes.
How did new farming tools and better seeds help farmers grow more food during the Green Revolution?
New farming tools made planting and harvesting faster and more efficient, while better seeds produced more crops per plant and grew faster.
Why do astronauts on the International Space Station look like they are floating?
Astronauts on the International Space Station look like they are floating because they are in microgravity, which makes them feel weightless.
How do satellites use transponders to receive, amplify, and retransmit signals back to Earth?
A satellite transponder takes a weak signal from Earth, makes it stronger, and sends it back down to Earth.
How does data travel across the Internet using IP addresses, routers, and packet switching?
Data is split into small packets with an address, sent through routers, and then reassembled when it reaches the right device.
How can scientists change genes to help plants fight off bugs or diseases?
They add, remove, or edit specific genes so the plant can produce traits like natural insect resistance or better disease protection.
What were some positive and negative effects of the Green Revolution on people and the environment?
The Green Revolution helped grow more food and reduce hunger. But it also caused environmental damage and didn’t help all farmers equally.
How does the International Space Station stay in orbit around Earth, including how its speed, gravity, and regular engine boosts help keep it moving around the planet?
The International Space Station stays in orbit because it moves very fast while gravity pulls it around Earth. Small engine boosts help keep it from slowly falling down.
How do groups of satellites work together, using their movement in orbit, radio signals, and links between satellites, to give internet access across the whole world?
Satellites work together by moving around Earth and sending data using radio signals. They can pass information between each other and down to Earth to provide internet anywhere in the world.
How do the Domain Name System TCP/IP rules, encryption, and content delivery networks work together to make internet communication faster?
DNS finds website addresses, TCP/IP sends the data, encryption keeps it safe, and CDNs store copies nearby so things load faster.
Why do scientists study inherited traits and genetic disorders, and how can this knowledge help doctors in the future?
Scientists study genes to understand how traits and diseases are passed down. This helps doctors find and treat diseases better in the future.
Why did some countries benefit more from the Green Revolution than others, and what challenges did poorer farmers face?
Some countries gained more because they had better resources and technology. Poor farmers struggled because they couldn’t afford modern tools or enough water and support.