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Unit 1 - Change over Time
1️⃣ Question 01 🪨 ⏰
How does Geologic time work?
Answer📝:
Geologic time is how scientists explain Earth’s long history. Instead of using normal years, they look at rocks to find out how old they are.
They use two main ideas: relative age and actual age.
Relative age tells which rocks are older or younger compared to others. For example, lower layers are usually older than the ones on top. Layers are also usually flat when they form, and cracks or cuts in rocks are younger than the rocks they go through (principle of cross-cutting relationships).
Actual age tells the real number of years since the rock formed, often found by using special tests like radiometric dating.
Answer📝:
Variations and adaptations happen because of changes in an organism’s DNA, which is like an instruction book for all its traits. Variations are the differences between individuals, like different eye colors or beak shapes. There are two main reasons these happen. One is mutation, which is a random change in the DNA. The other is sexual reproduction, which mixes DNA from two parents to make unique offspring.
An adaptation is a variation that helps an organism survive better. For example, if a bird has a mutation that gives it a slightly longer beak, it might be able to reach food that other birds can’t. This helps it survive and have more babies. Over time, this helpful trait spreads through natural selection, and these species slowly adapts to the environment.
2️⃣ Question 02 🧬
Why do adaptations and variations occur?
3️⃣ Question 03 🔍
Experimentation
Experimentation
Answer📝:
We done an experiment of sunflower seeds. We had 10 sunflower seeds and measured their length and width with a ruler.
At first, they looked almost the same, but after measuring, we saw that each seed was a little different. We wrote down the data of the length.
We learned that these differences are called variations. They happen because each seed has different DNA and grows in different places on the flower. This experiment helped me understand that all living things have small differences, even if they look similar.
After that, we ate all the sunflower seeds. It was a very fun experience, and I learned a lot from this experiment.🔬
Answer📝:
Genetically Modified Organisms (GMOs) are plants or animals whose DNA has been changed through biotechnology.
Scientists do this to give them special traits, such as resisting pests, growing faster, or becoming more nutritious.
GMOs are used to help solve challenges in agriculture, food supply, and healthcare. For instance, modified crops can survive tough environments and produce more food for increasing populations.
GMOs have both benefits and drawbacks. On the positive side, they can boost harvests, improve food quality, and lower the need for chemical pesticides. However, they may also harm the environment, decrease biodiversity, and raise questions about their long-term effects on health.
1️⃣ Question 01
What are Genetically Modified Organisms and why do they exist?
2️⃣ Question 02
How are fossils formed?
Answer📝:
Fossils form when a plant or animal dies and gets covered by mud, sand, or soil. The soft parts rot away, but the hard parts like bones or shells stay. Over a long time, more layers cover it, and minerals from water fill the spaces, turning it into rock. This process is called mineralization. Some fossils show body parts, and others are trace fossils, like footprints or nests. After millions of years, wind or rain can expose these fossils, helping scientists learn about life from the past.
Answer📝:
In this unit, I liked learning about fossils the most. I think it’s really cool how plants and animals from long ago can turn into rocks and stay in the ground for millions of years, instead of dying into ashes. I enjoyed learning the steps of fossilization, like when the animal dies, gets buried, and then changes into rock through mineralization. It helped me understand how scientists can find out what life was like in the past. I liked this topic because it made me imagine what the world looked like a long time ago in dinosaurs time.
3️⃣ Question 03
Please reflect on this unit and explain which part you liked the most and why.
Unit 2 - Energy and Motion
3️⃣ Question 01
What is F=ma and how this results in the changing of motion
Answer📝:
F = ma means Force = mass × acceleration.
It tells us that when a force is applied to an object, it will accelerate, which means speed up, slow down, or change direction.
If the same force is applied to a bigger mass, it accelerates less because heavier objects need more force to move.
If you increase the force on an object, its acceleration increases, so its motion changes more quickly.
This is why pushing something harder or having a lighter object makes it move or change direction faster.
3️⃣ Question 02
Explain what frictional forces are and how they impact the motion of any moving object
Frictional forces are contact forces that happen when two surfaces rub against each other. They always act in the opposite direction of motion and push parallel to the surface.
When an object moves, friction slows it down by turning some of its kinetic energy into heat.
For example, a book sliding on a table eventually stops because of friction. Friction can stop objects from moving, but it is also very important for helping us move. Static friction gives us traction so we can walk without slipping, drive safely, and hold or grip objects.
Friction resists motion but also makes controlled movement possible.
3️⃣ Question 03
The Ping-Pong Experiment
In this experiment, we rolled ping-pong balls toward each other to see what happens when objects collide. When the balls crashed, they changed their path and speed, showing that the impact force acted on both balls, not just one. I noticed that the direction and speed of each ball depended on how hard we pushed them. Watching how they moved apart after hitting made it easier to understand how forces behave during a collision.
It was a clear and a very interesting way to see how motion changes when things collide, and it helped me understand forces much better.
Unit 3-
1️⃣ Question 01
Explain what the differences are between Potential and Kinetic energy.
In class we learned about what's the differences between Potential and Kinetic energy.
Potential energy is stored energy that an object has because of its position, height, or condition. An object does not need to be moving to have potential energy.
For example, a ball placed on a high shelf has gravitational potential energy because gravity can pull it down. The higher the object is above the ground, the greater its potential energy.
Kinetic energy is the energy an object has because of motion. When an object is moving, it has kinetic energy.
For example, when the ball falls from the shelf, it begins to move, and its potential energy changes into kinetic energy. The faster an object moves, the more kinetic energy it has. Potential and kinetic energy are closely connected because energy can change from one form to the other.
2️⃣ Question 02
There are multiple different kinds of non-contact forces and energy.
Magnetic force is a non-contact force, which means objects do not need to touch for the force to act. This force occurs between magnets and magnetic materials such as iron, nickel, and steel. Magnets have a north pole and a south pole, and opposite poles attract while like poles repel.
Magnetic force works through an invisible magnetic field that surrounds the magnet.
A common example of magnetic force is when a magnet pulls paper clips toward it without touching them. Another example is a compass, which uses Earth’s magnetic field to show direction.
Magnetic force is also important in electric motors, speakers, and generators. In these devices, magnetic and electric forces work together to create motion or sound. Magnetic force helps power many technologies we use every day.
3️⃣ Question 03
Please reflect on this unit and explain which part you liked the most and why.
The part of this unit I liked the most was learning about potential and kinetic energy. I enjoyed this topic because it was really easy and simple to understand and how it connected to real-life situations.
I liked how energy can change from stored energy into moving energy. For example, when an object is at a high place, it has potential energy, and when it starts moving, it gains kinetic energy. Learning this helped me understand how motion, height, and speed affect energy.
This unit helped me see how energy is used in everyday life, such as when riding a bike, throwing a ball, or going down a slide. Learning about potential and kinetic energy made science more easier and helped me understand how energy works in the world around me.
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