How did we do it?

• Step 1: First, we measured the mass of our object using an equal-arm balance and found it to be 200 grams (g).

• Step 2: To find the volume of the object, we dropped it into a graduated cylinder filled with water. Based on the amount of displaced water, we measured its volume as 200 milliliters (ml).

• Step 3: We used one of the basic formulas of science: "Density = Mass / Volume". By calculating 200 g / 200 ml, we found the density of our object to be 1 g/ml.

Through this experiment, our students successfully transformed their theoretical science and math knowledge into a real-life problem-solving skill!

🎯 Amaç

Öğrencilerin yoğunluk kavramını günlük yaşam örnekleriyle keşfetmeleri ve gözlem yaparak çıkarımda bulunmaları.

🔍 Gerekli Malzemeler

• Şeffaf bir su kabı (leğen veya büyük bardak)

• Su

• Farklı nesneler: taş, tahta parçası, plastik kapak, madeni para, sünger, mandal, silgi

• Etkinlik gözlem formu (öğrenciler için tablo şeklinde)

🧠 Etkinlik Adımları

1. Tahmin Et:
Her öğrenci, nesnelerin suya atıldığında batıp batmayacağını tahmin eder.
👉 Örnek: “Taş batar çünkü ağır.” / “Sünger yüzer çünkü hafif.”

2. Deney Yap:
Nesneleri sırayla suya bırakın.
Öğrenciler gözlem yaparak “Batıyor” veya “Yüzüyor” şeklinde not alır.

3. Sonuçları Tartış:
Öğrenciler tahminleriyle sonuçları karşılaştırır.
Öğretmen rehberliğinde şu sorularla yönlendirme yapılır:

• “Taş neden battı?”

• “Sünger neden yüzdü?”

• “Ağırlık mı, yoksa madde türü mü daha önemli?”

4. Kavramı Bağla:
Öğretmen, “Yoğunluk” kavramını basitçe açıklar:

“Bir maddenin yoğunluğu sudan büyükse batar, küçükse yüzer.”

🎨 Genişletme Fikri

Öğrenciler deney sonuçlarını Canva veya Padlet üzerinde “Batıyor-Yüzüyor Tablosu” olarak görselleştirir.
Her nesnenin fotoğrafını ekleyip kısa yorum yazarlar:

“Tahta parçası yüzdü çünkü hafif ve yoğunluğu sudan az.”

🌟 Kazanımlar

• Gözlem yapma ve tahmin etme becerisi

• Bilimsel düşünme ve neden-sonuç ilişkisi kurma

• Yoğunluk kavramını günlük yaşamla ilişkilendirme

• Dijital araçlarla veri sunumu (Canva/Padlet)

To carry out the experiment you will only need two elements: A raw egg, White wine vinegar.

Method: Place the egg in a glass or jar. Pour in the vinegar until it completely covers the egg. Let it rest: the egg must remain immersed for at least 24-48 hours.

Result: After the necessary time, gently remove the egg and rinse it under water to remove any small shell residue.

Scientific Explanation

Vinegar contains acetic acid, while eggshells are composed primarily of calcium carbonate.

When these two elements come into contact, an acid-base reaction occurs.

Gas Formation: You'll immediately notice bubbles (carbon dioxide) forming on the surface of the egg.

Shell Dissolution: The acid gradually dissolves the calcium carbonate, causing it to disappear completely.

Bouncy Effect: What remains is the egg protected only by the thin internal membranes, which, being protein-based, give it its typical elastic and rubbery consistency.

Osmosis: You'll notice the egg becoming slightly larger; this is due to the water contained in the vinegar having passed through the membrane into the egg.

• A glass of water

• A pencil

• A paper with an arrow

• A transparent glass or jar

Procedure

1. Fill the glass with water.

2. Put the pencil into the water.

3. Look at the pencil from the side.

4. The pencil looks bent or broken.

Arrow experiment

1. Draw an arrow on a piece of paper.

2. Put the paper behind the glass.

3. Fill the glass with water.

4. Look at the arrow through the glass.

5. The arrow seems to change direction.

Explanation

The light changes direction when it passes through water.
This phenomenon is called Refraction.

Step 1: Fill a plate with water and sprinkle some black pepper on the surface.

Step 2: Touch the water with a clean finger and observe that nothing happens.

Step 3: Put a drop of dish soap on your finger, touch the water again, and watch the pepper quickly move away to the edges of the plate.

In this experiment, we compare how sugar dissolves in hot water and cold water.

First, we take two glasses. One is filled with hot water and the other with cold water. Then, we add the same amount of sugar to both glasses and stir them equally.

We observe that sugar dissolves faster in hot water than in cold water. This is because the molecules in hot water move faster, which helps the sugar break down and mix more quickly.

In conclusion, temperature affects the rate of dissolving. Higher temperature makes substances dissolve faster.

Purpose of the experiment: This experiment demonstrates how chemical substances change color according to their pH value. Materials used: Red cabbage, hot water, clear glasses, lemon juice, baking soda, vinegar, dishwashing liquid.

Instructions: Chop the red cabbage and let it sit in hot water for 15 minutes to obtain a dark purple liquid. Pour this purple liquid over glasses containing different chemical substances (lemon juice, baking soda water, etc.).

Result of the experiment: Each substance has a different pH value. Therefore, they all turned different colors. Substances with a pH value between 0-7 (Acids) are red or pinkish, while those with a pH value between 7-14 (Bases) are blue or greenish.

We conducted a liquid density experiment by pouring liquids with different densities into a glass to see how they layer. When we added water and pomegranate sour into the glass, we observed that the pomegranate sour remained at the bottom because its density is higher than that of water, while the water formed a layer on top. This experiment demonstrated that different liquids have different densities and that the denser substance always sinks to the bottom.