Worksheet identifying characteristics of living things with examples.

Problem Analysis:

The task is to identify which characteristic of living things is being described in each statement. The characteristics provided are:

- Reproduction
- Made of cells
- DNA
- Growth and development
- Obtain and use Energy
- Respond to stimuli (irritability)
- Homeostasis
- Evolution
- Excretion

Each statement must be matched with the appropriate characteristic. Some characteristics may be used more than once.

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Solution:

#### 1. Blinking when someone puts their hand close to your eyes
- Characteristic: Respond to stimuli (irritability)
- Explanation: Blinking is an automatic response to a stimulus (hand near the eyes), demonstrating irritability, which is the ability of living organisms to respond to changes in their environment.

#### 2. The process of photosynthesis
- Characteristic: Obtain and use Energy
- Explanation: Photosynthesis is the process by which plants and some other organisms convert light energy into chemical energy (glucose). This directly relates to obtaining and using energy.

#### 3. Getting rid of urine
- Characteristic: Excretion
- Explanation: Urine is a waste product that the body eliminates through excretion. This process removes waste materials from the body, maintaining internal balance.

#### 4. Consuming a grilled cheese sandwich
- Characteristic: Obtain and use Energy
- Explanation: Eating a grilled cheese sandwich involves consuming food, which provides energy for the body's functions. This is part of obtaining and using energy.

#### 5. A dog has a litter of eight puppies
- Characteristic: Reproduction
- Explanation: Having a litter of puppies is a form of reproduction, where the dog produces offspring to continue its species.

#### 6. A cow is a multicellular organism
- Characteristic: Made of cells
- Explanation: Being multicellular means the organism is composed of many cells working together. This directly relates to the characteristic "Made of cells."

#### 7. A baby triples its weight in the first year of life
- Characteristic: Growth and development
- Explanation: Tripling in weight indicates significant growth, which is a fundamental characteristic of living organisms as they develop over time.

#### 8. Mold on a piece of cheese multiplies
- Characteristic: Reproduction
- Explanation: Mold multiplying refers to the reproduction of mold spores, allowing the mold to spread and grow on the cheese.

#### 9. Pulling your hand away from a hot oven rack
- Characteristic: Respond to stimuli (irritability)
- Explanation: Pulling your hand away from a hot surface is an automatic response to a painful stimulus, demonstrating irritability.

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Final Answer:

\[
\boxed{
\begin{array}{ll}
1. & \text{Respond to stimuli (irritability)} \\
2. & \text{Obtain and use Energy} \\
3. & \text{Excretion} \\
4. & \text{Obtain and use Energy} \\
5. & \text{Reproduction} \\
6. & \text{Made of cells} \\
7. & \text{Growth and development} \\
8. & \text{Reproduction} \\
9. & \text{Respond to stimuli (irritability)} \\
\end{array}
}
\]